I would have gotten a PS2. This system has a few games I've missed out and that I need to play. And a few of them apparently don't work on any PS3, so the PS2 is the only way to go. Also, it's hard to be truely hyped about MGS4 on PS3 when you haven't played MGS2 or MGS3 as the story is quite important in those games.
I'm still planning to get one to go along with my Wii, but I already have too much games to play. I guess I should hurry though as the PS2 games I want are starting to get harder to find and getting more expensive.
I was also interested in a news about a newer PS2 model coming out in Japan (the SCPH-90000 series), a lighter model and coming with new "colors" (including a Ceramic White which would have been nice to go with the Wii). Unfortunately, there was no news after that, so no news of it ever coming to Europe. I don't think I should hope it ever comes and stop waiting. Or maybe I should go on my game hunt first and get the system later on.
