I ended up switching out my Ayre K-5xe preamp for the Audio Research Ref 3. The results were not subtle. Unfortunately, I don't have a VTL dealer anywhere close (Chicago), but after hearing the Ref 3, I am seriously considering the matching amps. I have also read/heard great things about some of the digital amps out there and am thinking of trying the Spectron Musician III since I can get a 30 day demo for free. I am getting pretty close to where I want the system. I think a change in the amp and perhaps some cable changes will get me to where I want to be. Beyond that, I'll need to make changes to the room. I may also look into a speaker upgrade, but that is a ways down the road. The Quatros are pretty amazing and everytime I put better electronics in front of them, they just keep getting better.
