Jakewash, Fredk and Adrian, Thanks for your replies. I accept your comparisons to equivalent sounding Pardigms, of the M60, to Paradigm Studio 60s and the M80s to Studio 100s, so I phoned the dealer today to price the Paradigms.

Studio 60s $4500/ pair. Studio 100s $6500/ pair.

I think I'm definitely going for the M80/500s now.