The Wii looks very good (although I don't care for the name or the controller). Third party support sort of concerns me, but I'll probably spend all my time playing the old games anyway, plus Mario and Zelda. This one is a given, if not at launch, soon after.
The PS3 has Metal Gear and Final Fantasy, but those might show up elsewhere. I have no reason to think Dragon Quest, Suikoden, Wild ARMs, Valkyrie Profile, Shadow Hearts, Legend of Legaia, Star Ocean, etc. will show up elsewhere, so eventually I will buy a PS3. It won't be until a significant number of those games become available, though, which, considering the development schedule for console RPGs, means the price should come down.
Someone could give me an XBox-360 and the only thing I'd play on it would be NBA Live... which I could play on one of the others. :\ If I want to play PC games (or PC-style games), I'll play them on a PC. All I play on the PC is X-Com, Heroes of Might and Magic and Alpha Centauri. Don't see those as titles for the 360, somehow.