Saw this the other day. I can't vouch for it's quality but I thought it was well priced for a electric tab tensioned screen.
http://www.shootandshow.co.uk/nexnix...ab_screens.htm
nOs you are right £3000 won't get a PJ and screen. My fault didn't read to the end of the paragraph.
However there are places that will do an electric 8ft screen at half price (£399) with the H79. I'm not too far out.
As for a screen recommend all I can vouch for is Carada because that's what I've got. Unfortunately they only do fixed frame screens as far as I am aware.