First off, thanks for all the responses. I've not had much luck in my searching AVS/here/google for answers in any meaningful form.
Put in a nicer way, tuner cards (i.e. HD Homerun, Sage TV tuners, etc.) only receive unencrypted channels, which are typically just the locals plus maybe 1-5 others. If you want to receive all your channels, you have two options: cable card and capture device + cable box.
A cable card would work just like your cable box to access all the encrypted channels. I'm not sure if a cable card is capable of receiving two inputs. If not, then you'd need two cable cards. I believe that you pay a monthly fee for the cable card and don't have to purchase it, much like with a cable box.
The Hauppauge HD PVR is the best option for an HD capture device. This will connect to your cable box and be able to capture what it's playing right then. You can set it up so that the PVR controls the cable box, so it will change channels on the cable box when it's supposed to record something. These definitely only record one input at a time, and you'd need two of them to record two things at once.
Edit: Depending on your situation, you might be better served with an HDMI switch serving the cable-box signal to all TVs and using an IR repeater to feed the remote signal from the other rooms to the cable box.
Here's another thought I just had. You mentioned that you won't be able to watch different things on the different TVs, and that's not entirely true. Going with the PC + cable card setup, you should be able to watch two different live shows on different TVs, and you'd be able to watch different recorded shows on different TVs. Obviously this wouldn't be the case if you went the HDMI-splitter route.
Currently, I have one cable box. I have thought about CableCards, but have had a really hard time finding any pci/pcie cards that support them (or external USB versions). So, I was thinking I would keep the cable box to get all the channels I get with it, just send that to the win7 MCE box instead of the TV/receiver.
The Hauppage HD DVR is nice, but I need the ability to record/watch 2 shows simultaneously. I don't care to get a second cable box if I can avoid it (let alone a second HD DVR).
The HDMI switch I had thought about, but as you mention I could only watch the same thing on all TV's. That means I couldn't change the channel when I'm in another room (unless I get an RF remote and such) unless I go back into the main room.
The CableCard appears to be the best option, but I don't see many choices on how to get them in a usable form for a MCE box.
You really do not need a tuner if you are going to use the cable box. Does the cable box have a firewire port ? Some do and if it is enabled you can get video from that.
Another option if you are willing to view the content at 720x480 is to get a standard svideo capture card for about $25 and use that.
Tuners are not advised if you use the box because what they expect it to be clear QAM on the input, then they simply down sample that and save it to the drive, saving the video takes little cpu power on the card. Cards that accept things like component or hdmi cost about $200 becuase they have to digitize the input , convert it , then save it.
I have a Scientific Atlanta 8420 HDC. It appears to have 2x firewire ports. I don't know if it's enabled though, anybody know off hand?
I have the ability to use traditional svideo/composite cables, but want to get 720P resolution (although I could use svideo/composite in the mean time).
So, either get cards that take HDMI input from the cable box, go the CableCard route, or deal with SDTV basically?
This plus the new Ceton PCI-Express cable card tuner (
http://www.cetoncorp.com/).
It will be released March 31st. You can tune 4 cable channels at once with one cable card that all cable companies have. No need for a separate box and you get access to all the channels you pay for. The only exception is PPV shows.
I do like this thing. A LOT.
$400 for the card alone ? You would be better to buy a dvr with cable card support.
For $400 that's not bad IMHO. Although if I could do the same thing with a DVR with cable card support for cheaper that would be nice. Have any links to DVRs that can do this?
Wait, do you just want to split your signal so all tvs in your house watches the same tv show? Heck, get a coax splitter and some wires
Haha, yeah thought about that already. It's not what I want to do though. I need to have any TV and/or computer be able to watch any cable channel (or recorded show) I can currently watch on my tv that is connected to the cable box. Oh, and 2 different live feeds can be viewed/recorded at once.