I really like the low end of the ref1000mkii's. When I first heard them, they sounded lean in comparison to my prior MF a3cr on the OHM Walshes. Once my ears adapted I determined that the low end was actually quite clean, tight and articulate. The term I have heard used that describes it is that they seem to take a vice like grip on the big OHM Walsh drivers, which is just what the doctor ordered! I can't imagine it being better. We'll see.....