I understand the adversion to using SS power - Yes, tubes are great, I used to be an SET tubes only guy with high eff speakers. but this hi-fi thing is about synergy and system matching. Your Dynaudio speakers were built for high current SS amplification. There are a lot of great sounding SS amps out there, you just have to look for them. What you ought to do is get a great tube preamp and a great SS amp - that is the perfect combo for your Dyns. I use Supratek Syrah pre and Plinius SA-102 on my Dyn S1.4s. Perfect combination. Extremely dynamic, rich, but not lean and "SS sounding." Like the poster mentioned above, Sim is also a great match for the Dyns. The w5 + dynaudio is AMAZING. But - stay away from sim preamps (in my experience the P5 killed the sound. lean-dry/SS sounding). Hovland preamp is a great pre for dyns. Also Nagra. Try a Hovland 100 and a Sim w5 hooked up to your dyns and I'll bet you'll change your mind about your SS amp generalization.
In regards to the posters comments above about boomy bass from dyns - You've really got to have them setup right, or yes, you'll have boomy bass. That means the right kind of amp that can drive the woofers (high current SS like plinius, sim, etc) and more importantly, proper room setup and placement. They've got to be WAY out from the walls or the bass will be boomy. If you can't get them way out from the walls, you've got to stuff the ports, or Dyn may not be the speaker for that room. Another option is to use a sub or pair of subs and high-pass crossover the dyns above the boomy bass frequencies (40-80hz in my exp)