There's a handy little USB device called
Eye TV you can use to hook up to your cable.
I'm a grad student and have the wireless Mighty Mouse. I really like it because no USB adapter needed and it's nice, low-profile design makes it great for tossing in a bag without bulk. The little scroll ball will take you about a day to get used to, but once you do, you'll like it and old scroll wheels just feel clunky and rough.
If you're big in games you have to go with Boot Camp install, but you can still use Parallels too if you want from the same Windows copy. If you're a gamer though, I would highly recommend going with XP rather than Vista as Vista does not work well with games as far as graphics. On my 2.16 C2D MBP, I was getting over 100 FPS on Counter Strike with XP and after I installed Vista the FPS went down to 70!! Just imagine a more graphics-intense game.
Some claim glossy isn't that bad. I don't buy it. The first time I saw an MBP in the Apple store, they had a matte and glossy side-by-side. Angled up towards the overhead lights, I could read the matte just fine and only saw a glare reflection on the glossy. I knew I had to have the matte as I move around with my MBP a lot in varying lighting conditions. I didn't want to have to be bothered by any glare. If I'm gaming or watching a movie, it's on my external monitor at home anyway, and movies and games are about the only time glossy is advantageous.
The LCD TV will work, but just keep in mind you won't be able to set it to a high resolution like a monitor. It'll only go as high as the screen, like 720, which I think kinda makes it worthless to use as a monitor.
Hope that helps. Congrats on your Mac purchase. You have already made the most important decision, and it was a great choice!!