My first instinct is a Muse One Hundred Sixty, this would be phenominal on DQ-10's...
My second thought would be a McCormack DNA .5 or DNA-1...
Third I think of a Sumo Andromeda II...
Fourth Hafler Transnova 9500
and Lastly Musical Fidelity A3CR Power Amp...
These amps are all capable, will all sound good with the Dahlquist and will run from $500 to $1000.
It is normally thought that these speakers need a lot of power, in reality, they need an amp capable of current (which comes with power)...