You might want to try a pair of Parasound Halo JC-1's. A few of us have tried them with VR4's with great success. I also like the spectron musician II/III on these speakers alot, but I dont think taht is going to get you what YOU want (the liquid midrange was the hint for me). Also, I own the speakers and I do not biamp.
I hope that helps.
I hope that helps.