I mentioned this in your other thread but maybe check out the Truth preamp from Ed Schillings. It can come with remote and is compatible with just about any source and can drive anything. I have a preamp with unity gain but no remote so I'm considering getting a Truth myself to go with my Pass Aleph J.
Exploring Preamp options for the Pass XA25
Please feel free to share preamp options for the XA25. I presently have an Acoustic Research LS-3 and am not sure this is the perfect combination. The Pass Headphone preamp is one option that I'm considering. Tube preamps?