I have used a Krell KSA 200s with the Dynaudio 3.3's with great success. You can buy a KSA 200s on eBay or Audiogon for about $2600 and they sold new for $7900. This is a wonderful amplifier, beautiful to look at and built like a tank. I am using the same amp to drive Dynaudio C-5's with spectacular results. Just buy the Krell KSA 200s, you will thank me. Don't buy the KSA 300s, it is a different animal and takes forever to warm up. The KSA 200s warms up in about 5 minutes. Good luck.