I have heard the Blue Heron 2's sound good with VTL 450 monoblocks as well as Rouge Audio's Zeus. I preferred the sonics of the VTL over the Rogue, however they are in different price categories. I have owned the Quicksilver V4 monoblocks, however they drove my Nighthawks and never heard them on the Blue Heron 2's.
If you are looking for the liquidity and finesse of tubes, yet the bottom end and solidity of a high quality solid state, coupled with no maintenance or heat- I would highly recommend you look into the H2o Signature Monoblocks.
I personally use the H2o Signature mono's with my Blue Heron 2's ... just sold my EMC-1UP with a First Sound Presence Deluxe Mk II preamp. Very similar setup to yours.
For more info on the H2o Sig Mono's you can read my mini write up (clickable next to my moniker) or read what Srajan at www.6moons.com had to say here : http://www.6moons.com/audioreviews/h2o/m250.html
If you are looking for the liquidity and finesse of tubes, yet the bottom end and solidity of a high quality solid state, coupled with no maintenance or heat- I would highly recommend you look into the H2o Signature Monoblocks.
I personally use the H2o Signature mono's with my Blue Heron 2's ... just sold my EMC-1UP with a First Sound Presence Deluxe Mk II preamp. Very similar setup to yours.
For more info on the H2o Sig Mono's you can read my mini write up (clickable next to my moniker) or read what Srajan at www.6moons.com had to say here : http://www.6moons.com/audioreviews/h2o/m250.html