I have a pair of Tympani ID's and I was briefly driving them with my NAD 50w 320BEE, which actually worked, although no doubt they weren't singing. I switched to an NAD C372 which has 150WPC and they came to life, not bad for an amp under $800. I briefly tried bridging the 372 into one speaker and it was alive, although NAD doesn't recommend bridging into a 4 ohm load I didn't have any problems at moderate volumes, which in my case wasn't my neighbor two flights commenting that I had an awsome set of speakers, I have audiophile neighbors.
If you have the bucks I would definitely try a Bryston amp but for under $1300 the NAD 372/272 set up is great.
Sincerely the metramonkey