If you get yourself a HiFace EVO USB to S/PDIF converter ($500) you can broaden the field of good DACs on the shopping list. The will sound at least as good as all but the best (and mostly out of your price range) USB DACs. You could then get a PS Audio perfectwave with volume control for less then 2,000, and still have 1,500 left good poweramps. for If you really want the USB DAC the Wired4Sound DAC4 is probably your best bet. Some of the best value for money poweramps in the 1,000 - 1,500 range range would be Odyssey Audio Stratos, but they are bulky. Getting used class D (Bel Canto 500s or two 300m) would work very well also.
$4000 to Spend on Amp, Preamp and USB DAC
So the title pretty much says it. Here's the proposition; Starting from scratch, for $4000, what is your idea of the best sounding pre-owned three component system (amp, preamp and USB DAC). The DAC or DAC/PRE will preferably have HT Bypass and definitely a remote). I listen to Rock, Pop, and Female Vocalists, and like to follow a driving bass line. Bottom Line; it must transport me to another dimension when I listen to my well recorded favorites. :)
Speakers - still the Dynuadio Contour S3.4
Cables - OCOS II
Interconnects - Anticables with Eichmann Bullet Plugs
Power Cords - Magic Power 1 meter
Source - AIFF files through iTunes
Speakers - still the Dynuadio Contour S3.4
Cables - OCOS II
Interconnects - Anticables with Eichmann Bullet Plugs
Power Cords - Magic Power 1 meter
Source - AIFF files through iTunes