GameRager: Emulate it.......that's what I do for some PS2 games I have discs for for various reasons.(I love playing at my PC desk some PS2 games, for example.)
Buy a PS2 is a good idea, the pcsx2 ( ps2 emulator) is really mess ( tons of config to get a game working). Most of games you will get graphic bug, low fps. If you don't own a Core i5 2500k with minimum 3.5Ghz or a i7, don't ever think try this.
I have a AMD B50 which is Phenom 2 720 unlocks the 4th core, most of games i only get approximately 30 fps with "Software graphic emulate" to fix graphical bug. However, Final Fantasy X run flawlessly (maybe it is a PS2 common title so it is quite optimized)
/ps: I only have some PS2 titles such as FF X, Ace Combat 4, 5... so it could be individuals