I picked up the Don King Boxing game during Gamefly's end of year sale, and compared to what else is out there, it's not half bad (I've also owned Showtime Championship Boxing, but thought it was a joke). I like the sim nature of it, but it's not without its problems. The biggest complaints have been the strange lack of depth perception and that if you're not constantly backing your opponent down, it's difficult to tell whether you can reach him or not. I will say, the punching mechanics are very well done though. Throwing straights, hooks, and uppercuts feels very natural. This is one game I could definitely see being vastly improved by Motion Plus. Not sure if 2K has any plans for a follow up, but I still think you could have fun with it. Plus, you should be able to find it for pretty cheap.