Warik, just get the PS2.
A computer is a $1000 gaming machine.. for the price of a good video card you can have a PS2 and your favorite game.
The gaming consoles keep a decent value too, unlike your computer and its software. When you get tired of the PS2 you can sell it and its games for more then 50% of what you spent on it.
I have a computer, I play computer games, but buying my XBOX was nothing compared to the $2000+ I spent putting my computer together (which I have to upgrade every year or so).
Brian