I kept my PS2 so I wouldn't have to worry about backwards compatibility. My PS3 is the 160gb model.
I have most of the PS1 RPGs I want, with the notable exceptions of Koudelka, Suikoden II, and Vandal Hearts. I'd never heard of Koudelka prior my internet-awareness years (2001-ish) and the other two were games I rented, mostly enjoyed, but never got very far with. Is Saiyuki any good? It's not based on that anime, is it?