I would get the Maxus over the Extrema 2 but the SBE II over the Maxus!
Extrema 2 is a very dependable gun. Especially for people that don't take care of em. They will always shoot no matter what. My Benelli must be cleaned at least once a month or I'll start having issues cause it's not gas operated like Brownings and Berettas. I just dont like the feel of an Extrema. But They are all personal preference. Just shoulder them all and see which one you like best. That Maxus is sweet though. Very light and shoulders well. My cousin just bought one a few weeks ago. Come on November 12th!