i second the adcom vote. i don't know the nht speaker, but you may want to consider the adcom 535 if 60wpc is enough. I always thought the 535 was the best sounding of the three (535/545/555), and I owned all three at one time (all mk 1 versions).
Best Used under $300 2 Channel Amp
WE ARE ON TIGHT BUDGET AND LOOKING FOR ADVISE ON A MIN.100WPC 2 CHANNEL AMP IN THE SUB 300 RANGE.WE HAVE SEEN ADCOM GFA 555,CARVER TFM-25,TFM-35,NAD 2400,2600.I AM A ROOKIE AND YOU GUYS ARE THE REAL PROS,,ALSO NEED STEERING TOWARDS PREAMP ALSO 2 CHANNEL IN THE CHEAPO DEPARTMENT.I WILL BE RUNNING 2 AMP BIAMPED TO MT NHT T5 SPEAKERS IF THAT MATTERS..THANKYOU///MARK