Here is a shot of my new room. It's 3m by 4m and these seem to be very good dimensions for my P3ESR speakers. I'm using the SomethingSolid stands which hifi_dave recommends (and so do I now!) and the Nagra VPA valve monoblocks put out 50wpc each, which is ample for the Harbeth P3ESR. I'm getting a cartridge for my SME Model 10/SME V turntable/arm soon, so I'll be able to move the TV out and reserve pride of place for the turntable on top of the stand.
I only moved the equipment in last night (since then I've toed the speakers in) and I'm really happy with the sound. The best sounding room I've ever had!