New gpu buying help..!

HELLO FRENDZ ,

my brothers old 8600gt went out of order

now i am looking to buy a new card for him

i have these cards in mind

hd5670 512mb xfx

gt240 512mb ddr3 asus

hd4670 1gb xfx

(or any other card you suggest.)

he usually plays games on his pc his monitors native resolution is 1280x1024 (i think)

well he usually plays fps games like say crysis, farcry2, crysis warhead etc

which of these cards would give better performance and at what settings would the card be able to run the monster (crysis)..!

at an acceptable frames 22fps-28fps average

thanks