High Powered Subwoofer Amplifier suggestions

Hi Fellow Audiogoners - can anyone suggest a very high powered amp that excels in low end performance for use with a pair of passive subwoofers in a quasi Levinson HQD system?
QSC pro audio
Sunfire Signature 600-2. Bridged Acoustat TNT 200s.
Eagle, or Electron Kinetics, Model 2A stereo amp or 400 mono blocs. Iverson knew how to design high current amps.