Thanks Stephen,
That does help.
The width of the screens (viewing width) is 171cm (just under 6ft), and 185cm (just over 6ft) respectively, which means your screen is probably nearer the larger screen.
I did notice that the gain is slightly different on each of the screens, but I do not think that I will have too many issues as the proj is rated at upto 2000 lumens.
The velvet border does interest me somewhat, as I have one now, which does help to reduce any light spill. I am considering adding some aftermarket Velvet to the screen border, but that defeats the object of buying a commercial screen
It is interesting that you say you would increase the width to 7.5ft if you went for a 2.35:1 screen, as much of the material I watch is of this format (apart from sky-hd). I was thinking about creating some sort of masking for the 2.35:1 films. I thought you lowered the size of the screen due to the issues with the tennis effect.
Why does everything need to be so confusing....
Ricky