I own the M's and drive them with MC 501's and single MC 275. Fantastic results with both. The MC 275 was a BIG suprise with regards as to how it handled the M's. It sounds way more powerful than it's 75 watts. Very close to the 501's, too close. So, I guess I feel they are easy to drive, because of how they sound with the MC 275. And yes they are worth it, every penny. Very musical speakers and built to very high standards.
