I just got a PS3 and need some games to build up a respectable library.

I already have:

-UFC Undisputed 2009

-NHL 10

-Madden 10

-Fight Night Round 4

I'm considering:

-Infamous

-Ratchet and Clank: A crack in time

-Killzone 2

-Resistance 1 and 2

So, any ideas?