I own the following mobile devices.
Dell XPS laptop. High powered laptop that can do almost anything my desktop can. It's listed in my signature with specs. It's fast, fairly portable, and great for gaming when I'm on the road for work and stuck in a hotel. I also use it as a media HTPC as well. It has no problems hooking up to my 55" LCD TV and playing games or streaming HD netflix or other medias. Quiet operation as well allows me to hear what I want without hearing my computer. Wtih the built in Blu-Ray player and software I don't have a need for a stand alone blu-ray player anymore either and was able to give that to another family member.
Acer Aspire One netbook. AMD c-60 dual core netbook that absolutely rocks. Way faster than any previous generation netbook and for $200 was a hard price to beat. Use it for netflix or when I need some windows apps with power but don't feel like bringing my better and bigger Dell laptop.
HP Touchpad 32GB. Fun little toy and for the price I paid it was just barely worth it. Wish there were more useable apps for it, but for a few games, surfing the internet at a bar, and impressing people (status icon) it does do those things well. All it needs is a true native streaming setup for netflix where I don't have to leave my computer on at home to use.
Nook Color. I bought this bad boy awhile ago as a refurb for $150 through overstock with a coupon about 9 months ago. Well before current prices brought it down to $150. Anyhow, I love this thing. I use it daily because I love to read. With the case I have it's about the size of a book which I am used to carrying all the time. I don't get eye strain from reading from a back lit device at all either. I can do sme fun things with it as wel since I have a nice 32GB micro SD card I can dual boot from to CM7. So many free ebooks out there I can read on the nook that is just not available to the kindle though. Many times I'll go out with this to read while my GF uses my Touchpad to play something like Angry Birds or to mess around with Animate Pro. The nook colro web browser works but could use some work. Some sites don't display well at all on it and it can be a bit more cumbersome to use.
All-in-all, I love all my mobile devices for different reasons. Some days I use one more than I use the others, but they all see use by me and have been worth the money. It helps I find absolute steals for my devices though. Like I only paid $680 for the Dell, $200 for the Acer, $150 for the Touchpad, and $150 for the Nook Color.