I've got the ref 1. I have only compared it directly to an aleph P. The ref 1 is slightly less transparent and detailed than the aleph P, but does give the music a wonderful warmth and aliveness. It's very smooth and has excellent bass with a huge soundstage. The ref1 also get's extra points for build quality, features, and an ultra fast remote control. Since you do have the aleph amp, I would suggest you try an aleph p with it. The Aleph P w/the aleph 2's is a magical combination. Since they are both very transparent you get amazing detail and clarity. I tried 3-4 preamps with my aleph 2's, and the aleph P is the best match. The adcom 750 was very good too.
CAT vs. AR LS25 vs. AR Ref 1 vs. Hovland
I have narrowed it down to these 4 preamps. I do not have the resources or the dealers to listen to all back to back. Any thoughts out there? I have a Pass aleph3 proac 2.5, basis 1400, theta miles. I am looking for the most transparent, highest resolution, tightest bass. Thanks!!