Thanks so far for your help MMan,
I built a cupboard on wheels with a 2140 x 1200 16mm Melamine backing for the screen.
I decided on the Benq W7000, it will be placed in a tall cupboard, 1.55m high and 4.4m from the screen (94 inch).
The Benq will arrive in 2 weeks.
I used 25mm velcro around the edge to hide the screw holes and provide a masking, whilst allowing the opportunity to place 2:35:1 masking (3mm mdf or melamine covered in 550gsm black wool), velcro on the back of the 3mm mdf, 2 x 1070mm strips.
What advice should I get from here, wait and see what the Benq looks like and try and calibrate it to avoid hot spotting, or go with a matte clear.
I read on the last page that over the course of a year or two, yellowing could be an issue.