I've dealt with a number of them over the past 24months. I'm using a Siemens 4215 which has all the features you requested. It's quite short on range though.(probably do to the intenna) About the same range as a Basic 900mhz analog phone, although I have X amount of computers and microwaves in my 3 story house causing High RFI. The Ear and Mic on the phone are decent enough at mid range volume and the speaker phone is right on the Phone itself. The phones chipset is made by Vtech as they are european telecommunications partner to VT.(AT&T and Sony as well).
The base is ordinary and doesn't feature anything but the page button built on the back of the base. Battery life. You really need to watch the battery. The phones OS(which I'll discuss in a second) is one of the several features that drains the battery down to 3 hours of talk use and about 8 hours stand by(with bundled batts). Depending on the Voice settings from low to high and how far of distance you travel around with the phone. The phone is powered by 2 AA 700maH NI-CD batteries. They don't last long so I highly advise you to pick up 2 1800maH NIMH AA batteries. I've tried 2000maH(1950maH) and the phone isn't capable of charging the 2000mah and 2100mah type batteries because of it's circuit limiations. It will just continue to see the battery as half empty even the battery is fully charged and basically overcharge the battery, which ruins it. The phone has around 10 ring tones. 4 basic and 6 melody I believe. All of them are very irritating since they aren't the basic "ring ring" comtemporay type of ring that you will find on basic rotary dial phone. The answering machine is quite nice as you are greeted by a warm female voice. It allows you to configure the options within the OS. The duration , The quality, The Voice storage option etc is quite useful. The aesthics of the phone has to be the best I've seen since Nokia's Micro cellphones were introduced. You can also configure a nice address book , if you have the patience to type in the alphanumerics. The caller ID feature is basic and will just be that. Nothing to jump about by anymeans.
The speaker phone is brilliant as you can walk away quite a distance from the phone still have the person hear you loud and clear(they can also hear as much as pencil falling on your floor) as you can hear the persons voice as well. But again, it will drain the battery to the point of needing a charge after 90minutes of gossiping. The color scheme I chose was black, graphite and silver. The base is Sony Silver. The same exact colors found on Logitech MX and dual optical series. It features a belt clip but no headphone jack. Which is mind boggling for phone of its price. The backlit LCD is green and flashes on every ring. The 4 way navigation D-Pad is controllable from one hand like a cell phone and easy to learn as it controls the Address book, the Intercom(for people who have more than one siemens phone on the network to contact each other from phone to phone in privacy) and up and down directions on the pad to scroll up the menu and address listing in the OS. You can also record up to 30minutes of conversation(or a memo to yourself in an unknown format) with the other party on the phone with you. You need their permission, but useful in an argument when female lies to you which can be used as verbal evidence.
Durability in the time I've had this phone since its release has been quite good. I've dropped from heights of 6 feet off of counter tops and dressers and it still continues to function like new. Water splashing from doing the dishes and the phone has survived typical abuse. The Operating system. It has to be one of the slowest OS's i've dealt with in a long time in mobility. If you've used most Samsung, Nokia, Mot type cellphones as of recent. Frustration will grow on you as the OS makes its route around the menu. I've no idea why they didn't use a embedded linux OS like Toshiba uses on their Mobilphile audio player. The menu comprisies of;
Room Mon: Which is for multiple Siemens 42xx phones on a network.
Apppointment/clock settings: Which allows you to configure the phone to as an alarm clock to alert you for your scheduled appoints. Not very useful when you're doing 10hour shifts. If you aren't there to hear, then what's the point?
Sound settings: Controls the handset volume, Set ring tones(nite and daytone rings) and how loud you want the the rings to be. The rings are so dreadful I wish they would've just added a vibration feature for the sake of it.
Handset settings: You can configure the Auto answer. Language set, english, spanish or french.
Register Phone: This is need to match the phone with its base. If it isn't configured when it's first taken out of the box. It won't function.
Answering machine: Set any key answer, answering machine message data base, Number of rings before the phone answers etc etc.
Overall, the phone has been decent.
The Pro's:
Aesthetics
D-Pad and minimal buttons to use.
OS features (but not the speed)
Size and durability.(the Micro version is only available over seas. Which way smaller than a Dollar bill found in the states)
Intenna. Nothing external to wave.
Back lit LCD.
The Manual was well written although to this very day I can't figure out how to use 3-way calling or allow an incoming call to rush in or click over. The OS limits that.
Cons:
Battery life.
OS speed. I've seen 486's move XP faster than this.
Some OS features are not implemented that should have been like, callerID filtering.
Ringtones. Aural punishment.
Range. You might as well get a corded phone when living in the city.
No headphone port. No handsfree talking on this one.
What I would like to see in the next 5xxx phones from Siemen phones are 1, A better OS such as Nix embedded. Bluetooth like Sanyo already went forward with for moving your Outlook Express book to the phone and managing it. Range. Also, it could be quite possibly smaller if they can find away to eliminate some of the non useful features on the phone. Flip or clam base build would actually make the phone quite small and not bulky while maintaining good quality.
My next phone will be the Uniden 5Ghz phone. Sometime next week. I buy my phones online from 101phones.com.