FNR3 is the game to get on x360 if you're into boxing sims.

User Rating: 9.2 | Fight Night Round 3 X360
FNR3 is a closest thing to getting into a ring without actually getting your lights punched out.
It's R-stick punch controls are intuitive and easy to master if you give it a try.
Parrying is not an uber-counter move as it was in FNR2 which is a good thing. Swaying is again quite important to any counter-punchers.
It's also very interesting how the game gives more variety of playing styles.
Graphics are simply awesome. Sounds are above par even though the commentaries are bit on the poor side.
FNR3 still is the game to get on x360 if you're into boxing sims.