Paradigm Studio 60 v5 somewhat boomy

Eight inches??? You really need to get them out a bit further from the wall. I had the Studio 60 v2 a while ago. They were very good in the larger living room. But when I moved my system into a smaller dedicated room they overwhelmed the room.

As I recall, your Onkyo has tone controls, right? Turn down the bass a notch and perhaps turn up the treble a notch as well. I would try to move them further out into the room, but I realize that optimum placement is not always possible. That Onkyo is a damn nice little amp for the money, BTW.

"They were very good in the larger living room. But when I moved my system into a smaller dedicated room they overwhelmed the room."

Bingo!

I love them they're fantastic speakers, but too much for my living room. I called the dealer today and he agreed to exchange them.

I'm gonna order the Signature S1 v6 YAY!

I think I did the sensible thing :)

Yep, boominess can be readily attributed to your walls and room. Try placing them further away from the walls both side and rear. Also, maybe if you have a finished basement, in my experience this is your best listening room due to the cement walls. I have the same 30k audio system and have used it in 3 different homes, each has had its issues with boominess, except for the finished basement with cement walls.

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.