I'm driving a pair of N804's + HTM-1 with 3 Meridian 505 monoblocks and a G68.
My normal listening level is between 60 and 70, with occasional peaks up to 80 (depending on the recording level of the CD/DVD).

The 505's are 160W into 8 Ohm each, and they never get more than slightly warm even after several hours of playing.

Maybe your room is acoustically difficult, in that it is absorbing the sound?

About the speakers you propose: the HTM-1 is the ideal center to use with N804's. I've also had an HTM-2, but this sounds quite different.

Also, if you main goal is 5(.1) channel music (DVD-A/SACD) I would advise getting N804's as rears. Just as the HTM-1 sounds different from the HTM-2, so do the N804's from the N805's.
The G-amp series should be gain-matched, so using different models should not be a problem.

Regards,
Mark

[This message has been edited by markvl (edited 07-20-2004).]