Consider Marvel Ultimate Alliance. It has tons of detail (costumes, Powers, Finishers, Team Building with flyers, tanks,leaders ,melee fighters). Tons of characters awesome cutscenes and pretty good BOSS stages.

Overall I rate it a 9 of 10

Metal Gear Port Ops is a great game regardless if you get lost in the background story(you can read reviews and fill in the gaps)

Personally I loved Marvel Alliance, tons of characters, worlds and cool bosses ,immersive RPG to tune up your superheroe team.

Definitly worth it a few MUSTS;

LArge Mem stick (2 or 4 gig), Any game rated 8or higher(personally MLB the SHOW 07, Marvel Alliance, Renegade Squadron Metal Gear Port Ops, Tekken Resurrection.Also ponder a second battery.Get a screen guard to protect against aFUBARed screen.

Pros: Put your music , Movies (MP4 format or UMD's), Pics and surf the web from any free Hot spots