I have had (and am currently using) a Ref 2, mk1 in my system for the last 4 years and absolutely love it. I have tried several other pre's including: Ref 2 mk2, LS25 mk2, LS26, and Pass Labs X1. While all of these units are very very good, none of them could knock out my Ref 2 mk1. The reason?? Bloom. All of the units were very crisp and clean sounding, none of them had the bloom the Ref 2, mk1 has. It is a wonderful combination with my Maggies.....
Now comes the Ref 3. This unit was truly amazing. It was extremely quiet, very accurate and did show some bloom. Had I had the cash, I would have traded my Ref 2 mk1 in on it. (Mind you, I heard this unit when it first came out and it was going for retail). Some day, I'll own one when the price drops. Until then, my Ref 2 mk1 does the job quite well.
Magnepanmike
Magnepan 1.6
ARC 100.2
ARC CD1
ARC DAC5
PS Audio Power Director
All sorts of other stuff!