As far mixers.

The Blue Lantern Stereo Sir-Mix-A-Lot isn't bad. It has two stereo aux sends, two stereo returns, panning and mutes. I put one in my rack and don't mind it. It's inexpensive as far as mixers go. Happy Nerding and Roland also make decent mixers that also respond to CV for panning or panning/level depending on which brand you go with.