Threshold - (Cas 2,400A,SA3,S150,S200,) Forte 4a, Muse 100 or 160 , Pass Labs Aleph - (3 or 30 or 5),Sumo - (The 5 or The Nine or Andromeda,)Classe DR Series any of them,my favorite here is the DR 2 and DR 8. Bryston 3B ST or 4BST.
Might want to consider another preamp, from the same manufacturers as listed above. With most of the amps listed above you may find that a sub woofer is not needed,unless your speakers only go down to 45Hz.