OK so getting back to the original posts question. The answer would be a Adcom 565 pre amp, if you can find one, they are a steal at $300 or less ( a great sounding unit for the money). I think the best Tube based preamp like a Audio Research would work some real magic with those mono blocks. A great sounding tube based pre from McIntosh or AR would set you back many thousands of $$. The Solid state AV Macs you refer to are mediocre at best sounding. Find a Modwright SWL 9.0 or a Manley labs J shrimp or a Dehavilland ultraverve lll, or Doge 8! Get something that will inject some real feeling into those Adcoms and DQ10’s! At a great price too!
http://www.stereomojo.com/Doge%208%20Preamplifier%20Review.htm/Doge8PreamplifierReview.htm
http://www.dehavillandhifi.com/UltraVerve-Preamplifier.htm
http://6moons.com/audioreviews/manley6/jumboshrimp.html
http://www.usaudiomart.com/details/649074964-modwright_swl_90_se_preamp_signature_edition_outstandin...
Matt M
http://www.stereomojo.com/Doge%208%20Preamplifier%20Review.htm/Doge8PreamplifierReview.htm
http://www.dehavillandhifi.com/UltraVerve-Preamplifier.htm
http://6moons.com/audioreviews/manley6/jumboshrimp.html
http://www.usaudiomart.com/details/649074964-modwright_swl_90_se_preamp_signature_edition_outstandin...
Matt M