I've lived in the no preamp is the best preamp and passive worlds. Both provided happiness and long-term satisfaction. I think everyone should experiment, as despite what anyone claims, those options do offer the best solution for many people. Or, many people at that particular junction in time...
Now, playing along that you want an actual preamplifier, my vote for "diminishing returns" preamplifier goes to the AES (Audio Electronic Supply / Cary) AE-3. With the statement that different components perform better or worse depending on the system they go into out of the way, I've seen this little preamp sound flat out amaze people. In fact, as good or better than some that if mentioned here would react like throwing gasoline on a fire. My only reservation is that it doesn't include a phono stage for those who require same.
Now, playing along that you want an actual preamplifier, my vote for "diminishing returns" preamplifier goes to the AES (Audio Electronic Supply / Cary) AE-3. With the statement that different components perform better or worse depending on the system they go into out of the way, I've seen this little preamp sound flat out amaze people. In fact, as good or better than some that if mentioned here would react like throwing gasoline on a fire. My only reservation is that it doesn't include a phono stage for those who require same.