Considering Harbeth C 7ES-3

Why are you looking at the Harbeth's?  You have to tell us why you are considering them and what you are looking for in a speaker.  There are plenty of other options I would look at before them unless you have actually heard them and are enamored by what they bring to the table. 

I have not heard them yet and look forward to the opportunity. I like what I hear about an open, natural sound, especially for acoustic instruments,  and the resonance of the cabinet design. They also seem to come up in forums as recommendations quite often. Any one know where I can hear them near San Francisco?

Harbeth makes a great speaker and they obviously have a devoted following. Spendor is also highly regarded and make a similarly voiced speaker. However, the key to choosing any speaker is to listen, and preferably in your own room.

it looks you have powerfull amp,it can be too much for harbeths.Dynaudio speakers like powerfull amps.For $4000 you can get dynaudio platinum c1 with stands.If you won't like sound,dynaudio has good resale value.

I owned the C7ES3 for the better part of three years.  Position them right, use good quality stands and you will have one of the best sounding speakers on the market regardless of price.