If you are yet to take the plunge to Leopard OS X, perhaps Micro Center's excellent $40 rebate on all Leopard OS X purchases shall convince you?
Micro Center has a possible deal configuration where you can get an Xbox 360 premium for $200. First, you can buy an Premium 360 for $399, then take advantage of their $100 mail-in rebate which goes until 12/31.
If you're not too picky about the brand of TV you want, Microcenter has some Syntax Olevia LCDs that go up to 1366x768 resolution, which is marketed as supporting 720p and 1080i. The prices are: