Tom,
Thanks for the response and good advice. I was probably just going to pick up the matching Venere center for now. Briweed suggested I move the L, C, R up to Olympica now (nice upgrade plus significantly better center positioning with the stand), but it's just not in my budget at the moment. I found another post (and have since lost it) that suggested the Bowers and Wilkins in-walls were sampled with SF mains (higher end models than Venere, but still) and the timbre match was "acceptable".
I was considering
these for the side and rear surround and
these for the ceiling. I'm certainly wide open for suggestions. I am trying to stay in the $500-ish range per unit as a ballpark. I can plan accordingly if there needs to be a little upward wiggle... just may take a little more time.
/clayton
ps. the space limiting factor is width, not heigh for side surround... so I could go with taller units, but need to stay under the 8" driver or so range in width. The columns are 17.5" wide and framed with double 2x4's on either side, so that only gives me about a foot of width for a side surround insert.