Right now the only one that seems to jump out at me is the Peachtree Nova125 but I'm hearing varying opinions on how loud it'll be able to crank.Anyone that doubts the loudness capability of the Peachtree Nova125/Klipsch RF-7II combo is just clueless, and does not understand the amp power/speaker sensitivity relationship.
I also agree with the NAD recommendation. Both the NAD or Peachtree will be an upgrade over the Denon.