There are a lot of laptops out there to meet your needs from various manufacturers. I'm alittle bias, but I really like HP laptops (because I use to own one). I've been eyeing the Acer Timeline series, but I'm waiting until Windows 7 is officially released.
Here is what I'm waiting for from Acer:
http://news.cnet.com/8301-17938_105-10282121-1.html
Have you checked out local stores?
As for the TV as a monitor...that is a good idea, just make sure you buy a wireless keyboard and mouse.