Best speaker between 15K-35K

Sounds like you are not set
on the Amp or preamps yet also. You may want to take a VERY serious look at the Atma-Sphere MP-1 pre amp and a set of MA-1 amps. Very very nice stuff. JMHO

Pulling a 15 year old thread back is sweet. 

Consider Monitor audio PL 500 II and Dynaudio confidence 60. 

Keith! 2004, I wonder how many speakers made in 04 are still in production today? When you think about it speakers from then to now have only changed in more metal drivers being used and that while having a higher ceiling is also more difficult to find the best components to get the best out of them. 

I had expected more progress in room integration to have been made, not in wall, but actual room friendly speakers. 

I would look seriously at Raidho.  Unbelievable imaging and soundstage. I would have to know a bit about your listening space to make a recommendation on the best model but there are multiple speakers in the X/XT,C and D lines that would fall in your price range.  The key is, what do you want the speaker to do in terms of frequency range and can and how do you want it to look aesthetically.