I got the Adcom GFP 750 and tested it.
These are the other components:
Mcintosh Audio 2125 (power amp)
Cabasse artis baltic ii speakers and SVS SB2000 pro sub
Rega Planar 8 TT with Rega Ania Pro Moving Coil Cartridge
Bluesound Node 2, streaming from Qobuz
Teac ud-503b DAC
Audioquest cables
Previously I used the pre-amp option on Cambridge Audio CX81
The sound quality is incredible (at least compared to the Cambridge). Soundstage, precision and details have much improved. I am getting the Van Alstine next for the comparison!