Here is a suggestion.
You keep your rwa monoblocks, and buy a pair of akg-1000's. Many people at head-fi use modded sonic impacts to drive akg-1000's, and are happy with the results.
Of course, the 1000 is not your typical headphone, so this is a risky approach. But, I love my 1000's, I do most of my listening with them, as I have no place to set up my speakers at this time (my wife kicked my stereo out of the living room)
Randy