You you might try the Emotive Airmotiv 4s active speakers and just use the preamp out on your NAD 3020. Each speaker is bi-amped with a 25 watt amp driving the air motion ribbon tweeter and and another 25 watt amp driving the woofer. The price on these speakers I believe is $299 for a pair direct from the manufacture. The received a good review in Stereophile and have a C class rating although one of the reviewers thought it to be class B. Plan on getting some good interconnects to hook the up to your preamp. I'm using Kimber Cable "Hero's" on my Airmotiv 4s' so that will bring you to your $500 give or take any deal you get on the interconnects.
