I'm a long time user ( and lover) of the Ampeg 810. Much prefer the sound of my Fender 610 neo. I have used the Super Bassman, Trace Elliot V6, and Orange Terror 500 through both.
The Fender somehow manages to fill the room with sound and makes subtle changes in eq more articulate than the Ampeg.
I've been hearing a lot of good things about the 610...I wish I could try one! Im just not impressed with my 410 neo cabs, again they sound thin and lack thickness and when turned up they get boomy. It may be I'm just used to the more vintage and darker sounding ampeg cabs. I'm not giving up on the SB just yet, I ran it thru my ampeg 610 and seemed to be what I prefer.
(& I DO like big butts
In fact the whole FOH PA system was either operating at its maximum. ..or slightly above that. .. or the S.E. wasn't that great. 