One amp that I had used for a few years while I had a pair of NHT 2.9's was the Acurus A-150. You can find them cheap on Audiogon for $300 to $400. I purchased two and biamped with fabulous results. It is a lot of bang for the buck. Plus it is made in America and distributed by Mondial.
I think these amps are discontinued but are still listed at the Mondial site.
http://www.mondialdesigns.com/acurus/previous
I think these amps are discontinued but are still listed at the Mondial site.
http://www.mondialdesigns.com/acurus/previous