FNR3 is definatley an AA title for 360, even if the series hasn't ever caught your attention.
This game is probably one of the best games to showcase the 360 capabilities graphics wise. This game is stunningly realistic from the textures to the imperfection in the boxers' skin and the sweat beads and blood that roll down their faces when they're in a tough fight. The crowd, however seems to have lots of jaggies...but I have only noticed this in multiplayer. The fact that cuts on the faces happen in real time is also a major plus for this game.
The sound is awesome, especially with surround sound. The crowd seem to come from all around while only the sound of you beating your oppenents face in will only come from the left speakers (or vice versa depending on your corner in multiplayer). The announcers in the game get really annoying really fast since EA didn't really put a lot of effort into what they say, making it really repetetive.
The gameplay is really good. The Career Mode in which you make your own boxer and fight your way to Champion is really fun, especially if you do it without cheating. Playing as Ali and De La Hoya are also fun, but nothing like playing as your own character and upgrading him throughout his carreer. Online is definately fun, especially if you have a friend who is willing to go up against you.
Ths game is a must buy for 360 owners and is easily one of the best 360 games to date.