David
When you return to the US, where will you be living? If you will be located near existing HT3 owners, you might be able to pay a visit and hear them yourself.
I am familiar with B&W CDM 7NT speakers, and am familiar with (but do not own) HT3s. In my opinion, the CDM 7NTs do not come close to the sound quality of the HT3s. I am not certain if your CM7s are similar to the CDM 7NTs I heard.
I can't comment about your amp and preamp, I've never encountered them. How powerful are those amps? The HT3, at 85 dB, is rather insensitive and does well with lots of power, apparently the more the better.
The only other higher priced speakers I've heard that might compare to the HT3s are the Vandersteen 3a signature. I prefer the HT3 over them.
I expect that others will chime in.