I run Earthworks SR77 into a w-mod UA5, and I really like it. It takes a lot of battery power, but no problems so far. I have run my mics with a V2-> SBM1, and I think that the V2/SBM1 sounds better than the UA5, but not by that much. At least it's not so much better to warrant the extra $$$ it would cost to get the V2 IMO.
I would be willing to send you some DATs of my Earthworks with the V2/SBM1 (Dead, Alpine) and the UA5 (Phish, Alpine) if you want to listen and make your own judgement.