I'm looking to put a pair of classic (not SE) CBM-170s to use in my office, which is about 16' x 12' x 10'. I would never listen beyond a low-moderate volume. The following three options seem sensible to me and range from $230 to $380 (giving a sense of my current thinking on price).

Emotiva BasX a-100
Parasound Zamp v.3
NAD C 319 BEE

I'll be grateful for comments, observations, warnings and/or other alternatives I should be considering. I think each of these should be plenty powerful enough, but if I'm wrong please say so!

Thanks for your attention and your two cents.