I've played RE1 on the GameCube - I think it was basically the same as the PS1 version only with better graphics and FAR FAR better voice acting "You were almost a Jill sandwhich!" not included
RE2 remake, and I'm looking forward to playing RE3 remake when the price is down. And it will go down.
That said, for those that have played much of the RE series, which ones are considered good, which very good, and which great? I know it's a personal opinion, but I'd like to know what's worth playing!