mowe on 20 December 2008
I'd definitely rent Quantum of Solace first. Average reviews are at 54 right now, with one of the major complaints being the atrocious framerate (that's important for split screen multiplayer, right?).
Give it a shot, if you like it then try to find it cheap somewhere. No need to reward developers for sloppy work.
# of games above 75 on Metacritic (including downloadable):
360: 241 DS: 144
PS3: 152 PSP: 126
Wii: 85
