I got a 36" Sony Trinitron (I forget the model no.) tube set several years ago that is plenty HD enough for me (1080i/720p). The only problem I have with it is it weighs about 400 lbs. But at least I never have to worry about it getting stolen...
I just bought a PS3 and ran it through the component video input (no HDMI input...just missed that, and the satellite goes in through the DVI port), and the picture on the Blu-Ray is unbelievable. Games are awesome on it too. Even my PS2 games look better on the PS3.
Gonna be a while before I need a new TV.