Haven't worked with the Stage A180s- but I have worked with the slightly smaller Stage A170.
IMHO, the Stage A170 is about the best off-the-shelf speaker system I know of in current production, for less than $500 a pair. They just don't do anything really wrong, and do a lot of things right. I've seen and heard them used with anything from a $199 Yamaha receiver, all the way up to a $1500 Rogue Sphinx hybrid amp- and they did well on all of them.
I'd say the A180 would be worth a listen, given that.
Regards,
Gordon.