I think the big thing about these PSBs is they drop to about 4 ohms through a good section of the lower midrange. That can suck a lot of current from an amp, so I'd suggest something with a good reputation at low impedance. A good (but not perfect) indication is if the wattage output comes close to doubling at 4 ohms vs 8.
Outside of some old tube amps I rebuild as a hobby, I don't follow the used market much. However, you might audition one of the newer Class D digital amps. There are some pretty powerful units out there at modest cost and at least a fair number of people really like them.
Outside of some old tube amps I rebuild as a hobby, I don't follow the used market much. However, you might audition one of the newer Class D digital amps. There are some pretty powerful units out there at modest cost and at least a fair number of people really like them.