ok Gamestop has this extra 50% extra trade in value going on today andd i has alot of 360 games i didnt pay for.. so im going to trade them

first im getting Skyrim pre-orderd, but ill still have enough value for some more games

what should i get?? MUST haves? no sports

here is what i own:

Soul Caliber IV
Oblivion
Fallout 3
Fallout New Vegas
GTA 4
COD: Black Ops
Halo Reach
Stranglehold
Batman Arkham Asylum
UFC Undisputed 2010

i am thinking about getting Bioshock 1 and 2, never played them.. is it worth it? i heard Fable 3 was bad game so im not getting that. I am also thinking about Bayonetta, anyone played that and can vouch?? what about that newest Castlevania??