Hi Larry,
First congratulations on getting the Rockport Avior speakers. I have heard them several times and they are wonderful speakers.
I do think that the ARC Ref 75SE and LS17se combo will not do justice to what the Aviors are capable of doing sonically. My recommendation would be to move away from ARC and go to the VTL 450 Series 3 mono block amps paired with the VTL 6.5 Series 2 preamp. I use VTL Siegfried amps with my Rockport speakers and it is a wonderful pairing.
First congratulations on getting the Rockport Avior speakers. I have heard them several times and they are wonderful speakers.
I do think that the ARC Ref 75SE and LS17se combo will not do justice to what the Aviors are capable of doing sonically. My recommendation would be to move away from ARC and go to the VTL 450 Series 3 mono block amps paired with the VTL 6.5 Series 2 preamp. I use VTL Siegfried amps with my Rockport speakers and it is a wonderful pairing.