NAD does mfr pretty musical AVR's but most likely, a good 2-channel integrated will sound better. I think there is a used NAD C375BEE for sale here on Audiogon that is within your budget.
http://app.audiogon.com/listings/solid-state-nad-375-bee-150-wpc-int-amp-2014-02-17-amplifiers-19057-levittown-pa
or
http://app.audiogon.com/listings/solid-state-nad-c-356dac-c356dac-integrated-amp-with-built-in-dac-free-shipping-manufacturer-s-2014-02-10-integrateds-01060-florence-ma
Bill
http://app.audiogon.com/listings/solid-state-nad-375-bee-150-wpc-int-amp-2014-02-17-amplifiers-19057-levittown-pa
or
http://app.audiogon.com/listings/solid-state-nad-c-356dac-c356dac-integrated-amp-with-built-in-dac-free-shipping-manufacturer-s-2014-02-10-integrateds-01060-florence-ma
Bill