Sorry, Cno but...
... it looks as if the Kef R300 are way too deep for my living room. When I popped into Unilet on Saturday with my cables I had a butchers at various speakers. The R300s were at the top of my must see list... didn't have the time to have a listen but straight away I saw they looked very deep - they're bloody huge. They're not far off Dyns Contour S1.4 in terms of depth. They'll stick out too far in the living room.
The LS50s looked good as did PMC GB1is and Twenty 22s and ProAc Response D1s. My RS6 are about 25 cms but the 300s looked far deeper. Didn't expect them to be that big TBH.
I'm a little bit deflated in all truth. Sorry.