Got NFL 2K3 and Fever and played Madden and in my opinion the best is Sega NFL 2K3 by a long way.
I think it is one of the best games on the xbox, iv played it the most.
Everything about it is quality from the great presentation and commentary to the good graphics with fantastic animations, V lifelike.
Id advise getting NFl 2K3, though it is quite sim orientated and takes a while to get into.