Nah, don't use an Express, sure its possible, but its really clunky and not at all made to do movers.
I'd vote for a HogPC. I assume someone somewhere has a windows box you could use for the shows, or that you could get one cheep. Get the programing
wing so you don't pull your hair out trying to program on a keyboard or mouse.
Great console, reliable. Just ran a show off of it with 96 dimmers, a handful of CXIs and 6 Mac2Ks, worked great. It may be a bit complex for people now, but I had no trouble learning it after being raised on
ETC Express. While it does have some complex advanced features, you can always ignore them.
I also second the vote for the Smartfade ML. Never touched one, but what I've seen online makes it look nice.