I posted on your other thread as well. I used the Aleph 2s with the GFP 750 and a Meridian player and got more drive than I get with the Wadia 860x without the preamp. The GFP 750 in passive mode should work great unless your speakers are not very efficient. I have Dunlavy 4s (91db efficiency) I also have a Rotel 855 and I can tell you firsthand that if you upgrade to a Wadia you will get sound that is in another league compared to the Rotel and a preamp. If you don't care about switching sources then forget the preamp.
Aleph 2 needs CD/pre. "P",Adcom,Wadia?
Just got Aleph 2 monoblocks for Verity Audio Encores. Understand Alephs aren't passively drivable. Should I chase an Aleph P, Adcom GFP750, or other preamp, and limp along with my Rotel RCD855 until the revolution, or get a Wadia 831 in September and kill two birds...? What's a Resolution Audio CD50? Can/should I get one now and forget about preamplification? Thanks...I'm lost.