1. MGS2 SOL..
2. FFX
3. Silent Hill
If these games were ported, I am sure you wouldn't need super powerful computers to run them.. They will be designed to run on PC's not consoles.. Meaning they will run better natively on PC's than if they were emulated.. Emulation of a ps2 emu to play the games and porting it are different when it comes to the Computer requirements..
Most computer games, and I am assuming that the ports would also, have graphics options.. So if you have a lower end comp, turn off some of the extra graphic features for more speed..