We have all three, xbox, gamecube and ps2. I have 2 girls and they play the ps2 or gamecube and my husband plays the xbox. It really does depend on the type of games you like to play. I would suggest if you have alot of ps1 games to get the ps2 since they can play those on there as well.
As for Mortal Kombat Deception for xbox. I just got a great deal on Ebay you might want to check it out. I got the game brand new never used and strategy guide for 25.00 plus I think about 7.00 for shipping. $32.00 shipped you cannot beat that deal.
Lisa