it would be wise to get xbox
firstly the original games are cheaper
secondly with konami releasing games on xbox, there are as many
sports games on it as PS2. so getting xbox yields more value and
the processor/graphics is relatively better in xbox than in
ps2.
Thirdly, xbox got harddisk. ps2 you got to buy memory cards and
memory cards are fragile and quite ex( $35 a piece).
So if you like playing sports games get xbox.