In my case, I am using a DIY Solid State power amp for my front speakers, Krell KSA-80B (it will be converted in KMA-160 mono block in a later stage) for my centre speaker and Krell KAV-250A for my surround speakers. Overall performance is really nice.
It was tailored made by a HiFi master in Hong Kong. The output is 80W/8ohm (True Class A). It can drive my fronts easily, even the Rey Audio speakers. The HiFi master told me that the key point was the ultra high current produced by the Solid State power amp. That's why I matched it with other 2 Krell amps. That's my layman comment! Correct me if I am wrong.