I would go for the PS2. I have one and love it. Been playing a game called
.hack. This game is fun and is unique because you are playing a online game offline. Hard to explain you would have to rent it to understand. The other game I have been hooked on is Dark Cloud 1. For only $19.95 the game rocks and made the Greatest Hit list. Dark Cloud 1 reminds me of the old school zelda with a twist. The world you live in is destroyed by a Dark Genie. Before it was destroyed though everything in the world was encapsulated so it would protect the building and people from destruction. However the Dark Genie was so powerful that it spread the buildings and people into parts of the world. You are the only one that can save mankind.
As you can see I am a RPG/Adventure kind of guy. Though when you look at what you can do with yourself I would look at what is the most enjoyable to you and stick with that. What is going to give you the most enjoyment.