it depends what you are look to do.
if you want pres and eq with direct outs then look at a A&H mix wizzard
if you need bus outs etc then prehaps a mackie onyx
I know mackie catches a lot of flack here, but, considering the price, I have never been anything but impressed with their onyx series. They have a lot off routing options. Also, the pres are far better than on your motu. If you get one of those boards, you might well be tempted to just get the firewire card for it and use it instead of your motu. The conversion is at least comparable, and, as I said, the pres are far better.