I have never played a StoneAge but I have played Emperor stuff. I currently only own a 1x12 (not enough) and couldn't be happier with it.
They're stuff is really nice and the prices are typically pretty good. Check out their website and shoot them an email asking for a price. At one point there was a section on the site to request a quote and you basically fill out all your desired specs.
Hope this helps a little bit.
Cool. Is there a particular type of speaker that does better than others in a Stone Age? I ask because I remember reading how Mills cabs are designed around the v30...