If you can stretch your budget by $99, I don't think that you can beat the Peachtree Decco. Good amp - should work well w/ 94db speakers. Great DAC. I have one in my office at work and think that it sounds great, especially for $499. You might be able to find a used one here for $400 or so.
Decco Brochure PDF
Peachtree Audio Decco - Buy
Decco Brochure PDF
Peachtree Audio Decco - Buy