I've owned both a ps3 and a 360 since their respective launches---camped out freezing all night for both! (and met some really cool people in the process!)
I like both consoles too (and you'd probably be happy with both)....but if I had to pick one...I'd pick the ps3.
3 main reasons---
1. Blu-ray is gorgeous & the ps3 upscales normal DVD's
2. PS3 doesn't have RRoD
3. I like the exclusives for the ps3 better than the exclusives for the 360 (I'd die w/o FF) and that is PURE PERSONAL PREFERENCE--obviously, many feel differently.
Eitherway, maybe you should wait until GDC is over and make sure nobody has anything happen to make you regret an early decision. (like a Shadow of the Colossus or Halo 4 announcement) Just a thought.
PSN ID: Sorrow880
Gamertag: Sorrow80
Wii #: 8132 1076 3416 7450