I too have the Onkyo A9555 running the Paradigm Studio 60v.5. Initially I had my speakers about 5 ft. from each other, and the bass seemed a bit boomy, and the soundstage was not that great. I adjusted the speaker position, allowing more room between and behind the speakers, and not the bass is awesome. Tight and fast. The imaging has improved dramatically. It's all about proper speaker positioning.
I see you have ordered the Signature S1. Unless you use them with a subwoofer, you will seriously miss the bass.
I see you have ordered the Signature S1. Unless you use them with a subwoofer, you will seriously miss the bass.