looking for circa $5k full range towers

Second to PSB Synchrony One. I think it deserves the Class A rating. Very neutral and smooth. Solid bass. The best speakers I have owned (owned ProAC, Spendor, Sonus Faber, Vienna Acoustics, Dynaudio, Opera, JM Labs, Thiel before).

If you can find them used I would recommend a pair of Salk HT3. They are the best speaker I have owned or listen to. You can check them out at audiocircle dot com. Great highs, a mid-range to die for and the fastest tightest best that I have personally heard.

As always there are some great suggestions from the people here with a vast amount of experience. I spent about a year looking for the right speaker and you will know the one that is for you when you hear it.

Peace and good luck.

DeVore Gibbon Super 8s:
http://www.devorefidelity.com/gibbons.html

The Merlin VSMs are my favourite speakers, but not sure what you mean by full range. A speaker with even more bass (if that is what you mean by full-range) presence would be a used pair of Vandersteen Quattros. In a room your size, I think the Merlins would do quite a good job of giving you realistic bass.