Have you played the Mass Effect series? A little more action oriented, but you can develop a character to suit your play style, if you don't like to run and gun.

Only part 2 is available on the PS3 (with part 3 coming). You can pick up the first one for the PC cheap now, though.
Pioneer VSX-1018AH-K, PDP-5020FD, DV-79AVi
Axiom M22s, VP150, QS8s
Sony PS3, surround backs