Hmm, I never thought Madden looked that match better on an XBox to overshadow online play. Its football, you really don't have much time to admire the graphics

.
You can import rosters very easily on the PS2 as well.
Without the online play, I'd still be torn though, as the PS2 controller with the four shoulder buttons is the better controller for football, imho. The S-controller is great for other stuff, but any game that makes me hit the black/white button leaves me a bit cold.
You can most likely fit two dynasty saves and one roster per PS2 memory card, which is pretty solid for most. I don't have enough time to play online, and play more then two dynasties

.