Recently picked up a pair of unused Klipsch RB-61 II's. I first tested them with a Crown XLS402 Power Amp. Yes, I know the amp is an awful choice for these speakers, I just happened to have it nearby... and yes the speakers did not sound so good. ha.
Then, I managed to buy an old Harman Kardon 430 and hook it up. Unreal how good this combo sounds!
This makes me feel a little better - I just sold my 1989 Klipschorns last week