The best ADCOM preamps in order of excellence are: GFP-750,GFP-565, GFP-555II, GFP-345(with PHO-802A Option), GTP-400, GTP-500II. Some of the Parasounds are pretty good too. but I am not as familiar with their design. Make sure you get the ADCOM 555II and 500II versions not the ealier versions which are not as good.
Adcom tuner pre combos/Parasound preamps....
Granted these are not SOTA preamps...but considering their reasonable used prices...any models that come to mind for 2-channel listening...phono/remote a bonus...thanks...