Paul Curtiz - equilateral triangle. Kick- for what it's worth, I have the 20/20bas (powered) and like them very much. However I also have NS-10s, cheap KLH home/hi-fi satellite/sub (for real-world checking) and a pair of PA spkrs w/15's hung for live stuff and ear drum abuse. So I have some other points of reference. I agree that monitor speakers are a very important link, but you shouldn't have to break yourself, either. I think the most important thing is to KNOW those speakers - whatever they are - really, really, well!