Sim would be a fabulous match with the Dyns. I have listened to the W5/W10 with Dyn 3.0 at my local dealer lots of times and these are stunning combinations. Can't go wrong, if you want tremendous power, amazing macro and microdynamics, bass that is very well controlled. The Sim amps are amazing at controling the signal, especially the bass, which can get away from you with the Dyns, especially if not in the best of rooms. I think Simaudio is one of the Canadian main distributor for Dynaudio.
Alternative Audio in Dundas, Ontario carries both Sim and Dyn. They pair the W10 even the monsterous Rock with all sorts of Dyns from 25 specials up to Evidence with jaw dropping sound.
Give them a listen before making any judgements.
http://shows.soundstagelive.com/shows/avtour2002/mtl_stand_simaudio.shtml