At the resident evil 4 question, if you're gonna get it. I'd recommend getting it on PC. You can upgrade the textures to that of the Gamecube, which were better than the PS2 version. All the extras are there from both versions, and theres a weapon thats available on neither console version. A laser. Also it works perfectly with the 360 pad.

Oh and it'll be cheap as chips on PC. From experiencing playing all 3 through to finish, i'd rate them like this:
gamecube version > PC version > PS2 version
The visuals are a must, and the PS2 just doesnt hold up