Might be an idea to look for a 1440x1050 20.1" widescreen as that's only slightly higher res than a 17"-19" widescreen (1440x900) but a good size larger.
novatech have one for £140
http://www.novatech.co.uk/novatech/s...tml?TFT-NOV201 don't ask me what it's like though.
EDIT: sorry ignore
it's non widescreen 1400x1050 and looks suspiously like a Video7 which are pritty pants in my experience.
scan have a glassfronted Asus one for £233
http://www.scan.co.uk/Products/Produ...oductID=644794
For wide screen I'd agree with 22" or 27"+ or look around on ebay or simular for an older 22" which has a lower resolution.
Other alternative is a LCD TV as they can be got in larger sizes at smaller resolutions.
Or a Projector, however projectors need regular mataince and replacement lamps are expansive giveing them a high running cost.