What are the other great PS3 games i can buy aside from resistance:Fall of Man?

motorstorm, really fun and chaotic racing, limited in features though (will have DL content)

NBA 2k7 if you like basketabll this game is extremly realistic

MLB 07 the show, very realistic basball sim

Id get Motorstorm or Oblivion.

If you can get past the camera angle Genji:Days of the Blade really isn't that bad.
Plus, you could probably find it used for near $40.

formula 1 is truly next-gen.

viruta fighter has amazing graphics aswell, but the game is soooo damn hard, really hard!!!

motorstorm is a must, lots of fun... again, a difficult game but not as hard as VF5.

call of duty 3 is the best FPS out i feel,does have some framerate issues ... but nothing major at all and rare.

nba2k7 is basketball in true form, again .. some framerate issues, but nothing major. 

Motorstorm, F1, MLB 2K7, MLB 07 the show.

I've also heard that blazing angles is also good.

Motorstorm and Oblivion are both good choices. But if you want something that'll last you until Ninja Gaiden: Sigma and other games come out, I'd get Oblivion.