well i'd say if ur gonna get a ps3 wait to see if it will drop to $300 for the 40BG version and $400 for the 80gb u kno just so you can save some money.
nd the ps3 has
1. Metal Gear Solid 4
3. Killzone 2
4. Little Big Planet
cant think of any more on the top of my head but ps3 still has uncharted, heavenly sword, and ratchet and clank that are already out and not to mention some good multi party games the ps3 will be getting like devil may cry and grand theft auto