Well, if listening at low levels in a small room, a quality 50wpc amp well drive any honestly rated 6-8 ohm speaker having 85-90dB sensitivity. Pairing the right one to a particular speaker to suit one's preferences is the key.
I have owned the NAD 326BEE and like that one. If wanting something new and at reduced budget the Yahama A-s301 (~$350) is a good bet.
I have owned the NAD 326BEE and like that one. If wanting something new and at reduced budget the Yahama A-s301 (~$350) is a good bet.