Hi axiom man,
I think you might have misunderstood me; I would not have suggested your adding subwoofers to the QS8 surround channels. It would be pointless, as your LFE main subwoofer channel will handle all the deepest bass.
As to the Paradigm Studio 60s, they certainly aren't "better". They will likely have a slightly different tonal signature and the usual Paradigm bass hump, which will make them sound "warmer" at first, then that "warm" hump will get annoying with long-term listening. The Axiom M60s and M80s are more neutral through that bass region and are free of that "warm" coloration.
Regards,
Alan
