The only other company that strikes me as similar to acoustic image is Phil Jones. Euphonic Audio did a good job of catering to DBers, but I think they stopped making combos quite a while a ago (and now they don't make anything). The Genzler Golihur special is very cool and very much in the AI vein, but it's a one off special--not something that I expect them to expand on.
Fortunately, there are lots of very good options for separate components these days, and for those looking for combos, there seem to be a number of BG combo amps that work reasonably well for DB as well--but you can forget about variable HPF, phase switches, and phantom powered mic inputs on those.