Definitely Sony. I've owned a 20" Sony WEGA for 5 years now, and I still get amazed at the picture clarity and color accuracy to this day. I am now forever a loyal customer of Sony televisions. I have tried out other TVs, and they just don't compare. Other brands have problems with picture redness or blueness, and smearing issues.
I currently play my PS2 (which I love) on this TV, and it looks great. Now, you talked about getting a 480p capable TV? Well, two things. Some PS2 games support 480p, and all DVDs support 480p. So, if you watch DVDs on your PS2, then 480p is a must. However, even if only a few PS2 games support 480p, I would still recommend a 480p TV. Sony TVs have DRC circuitry, which upconverts 480 signals to 480p or 960i. Try the 960i option, I'm sure it will look nice. Plus, the future is coming: PlayStation 3 in 2006. PS3 will undoubtedly support high definition for almost every game. You don't want to be stuck with an old-fashioned analog TV in just 2 years from now, when you could be enjoying PS3 games in HD!
Since you don't have a price limit, I would recommend any two of the following TVs, depending on whether you want 16:9 widescreen or 4:3 standard aspect ratio. For 16:9, get the KD-30XS955, for $1,400. It has a Super Fine Pitch CRT, black cabinet, and PS2 must look amazing on this. If you want 4:3, I would recommend the KV-32HS420, for $1,000. It doesn't have a Super Fine Pitch CRT, but nonetheless, would still look amazing with PS2, because of the Digital Reality Creation (DRC).
I would love to get one of these TVs, but they aren't fit for my room, which is kind of big. I want something in the 40"+ range, which eliminates CRTs, and leaves the choices of other technologies, which are oh so expensive.