they have to be small. i have bookshelves galore...so that's were they'll have to go (8" or less). it's that whole "off axis" thing that has me bothered. i need the soundfield to be as cohesive (for multiple seating positions) as possible. it certainly doesn't have to be (and wont't be) "audiophile perfect"....i'm just trying to "wring" the most out of an awkward space (utilizing as invisible a footprint as possible).