Im a big fan of McIntosh amps with Dyns but it depends on what your needs are. A good friend drives Contour 2.8s with tube amps (QuickSilver Silver 60s), but he lives in a modest uptown apartment and isnt playing at eviction levels.
As I said Im partial to the Mac stuff... if you are on a budget try picking up a MC7270 or the MC2255 They are classic Mac amps with big power and autoformers. Currently I use the MC402 and a MC352.
Do a search. There is a Dynaudio dealer that has some very good, yet affordable seggestions of amps that pair well with the Dyns. But once again it all comes down to what your needs are.
Good luck
Tony