I have had success with all the amps I've thrown at them. I started with the Dared DV-6C, which is tube preamp stage feeding class-d amp stage. 65 watts at 4 ohm, bi-amped. More than enough power, and sounded wonderful.
Next I powered them with the new Pioneer SC-68 receiver. This offered about 225 watts at 4 ohm. Wonderful sound.
Now I use a Harman Kardon HK990 integrated amp, which is 300 watts at 4 ohm. This is an amazing integrated, so it sounds lovely.
Remember, they are rated at 100 watts max I think. Find a good amp that is stable at 4 ohms and enjoy man.
Mot