I'm not a gamer but my daughter & SIL are. They have Playstation2 & Wii.
I think the PS2 plays Dance Revolution & Guitar Hero (another big game). It also plays BlueRay HD DVD's. So, of the two, that's their pick.
I loved playing the Wii with them. It was a lot of fun but my daughter said there are just not enough games out there for it yet.
I hope this helped a little. I bet someone around here that actually plays the games will come around & give you better info.