Hi Laffer,
I recommend that you do everything that you can to audition Adcom gear with your DQ10's. We have all learned the hard way that all of our ears are different, but for me, there is no question that I would develop fatigue fairly quickly with Adcom and Dahlquist. DQ-10's are detailed, revealing and without mods a touch light on the bass, DQ-10's will get edgey with some equipment.
Now after all of that said, If you like the Crown/Adcom combination, forget all the above. The GFP-750 will lunch it in every aspect. Good Listening, Tim