I'm tired of playing Yahtzee on my cell phone during lunch/bathroom breaks...need to step things up a notch, or five. So, I've been thinking about getting one of the new portable systems, either a PSP or a DS. In your experience, what are the pros and cons to each of the systems? How good are the games? I enjoy racing, RPG, and GTA type games the most, if that makes a big difference in which system would make the most sense for me. Any suggestions? Thanks!