So, I bought a PS3...

[Goemar]

Batman is perfectly fine on the PS3, and has the Joker stuff (which is kinda nice, as his takedowns are amusing).

My collection is...

Batman
Bionic Commando (for £9 its worth it... I think, I love and really hate this game)
Club, The (also dirt cheap now)
Dark Sector (worth it for the price it is now)
Dead Space (seems to be cheaper on the PS3)
Devial May Cry 4 (... actually don't get this)
Everybody's Golf World Tour (Kratos, playing golf? Great game!)
Heavenly Sword (I love it, a lot don't (most reviews don't even mention the block system... Give the demo a try)
Killzone 2
Little Big Planet (Hard to recommend because of it's floaty physics, check out the demo and wait for the GOTY edition)
MGS4 (duh)
Motorstorm (with how cheap it is you need to buy it before you get the second one)
Motorstorm Pacific Rift
Ninja Gaiden Sigma
Prince of Persia (if it's cheap)
RAIL FAN!!!
Ratchet and Clank (and get the PSN one, which is actually a better game)
Resistance 2 (skip the first one)
Uncharted

For PSN games...

Wipeout HD (awesome, awesome game - Fury add-on is also out now)
Bionic Commando Re-Armed (easily the best game, ever)
Megaman 9 (good D-pad for the win!)
PixelJunk Eden
PixelJunk Monsters (great alone and with a friend)
Everyday Shooter
Super Stardust HD
Flower

And coming soon(ish) Ratchet and Clank 2/3/5/6 aka the second/third PS3 one, God of War 3, Uncharted 2 and Trine