If you want to go the monitor route then these guys are doing a 17" F-17 Neovo for a blinding £269. 20ms refresh rate as well, which should make it great for AV usage.
http://www.blankdiscshop.co.uk/acata...Section__.html
I got myself an LG 15" LCD TV a couple of months ago for £349 from HoF. I think they were on promotion back then as they seem to have gone back up nearer to £500 in some places.
The LG I thought was better than the equivalent Samsung, and had a better picture overall. It still suffers from some blurring on fast motion but you tend to get used to it. Close up it is very easy to spot the digital artefacts and the poor quality picture on most LCD screens. However, if you view these screens generally as a TV, ie from a few feet away, then the picture is very good indeed.
For static images or for PC use though LCD screens are fine and are generally as good in this use as their CRT counterparts.