If you decide to go "vintage" check out the Sansui AU 517 & 717 they are both nice amps. Dual mono design. The 517 is rated at 65 wpc and i believ the 717 is 85 wpc. If i were you though i would get one that has been recently serviced because there are parts that go bad on these amps over time. But they are very solid amps and you can get them quite reasonably.

Haoleb's Audio/DIY Website