I looked into screens a lot recently, researching before i built my new PC. Seriously, ignore all the advice about Lcd's being so inferior for gaming... I've played dozens of games on my new TFT display, and its about one-thousand times better than my old 17" CRT.
There's no ghosting at all on pretty much any new panel, and brightness and clarity can be very high if you pick a good make and model; pick wrong and you can still end up with a crap display though.
The screen I ended up choosing isn't really the spec you requested, but I'm SO happy with it, I thought I'd share. I bought a
Viewsonic VX910, which is a stunning 19" monitor... the new version of it which came out seconds ago has a 12ms response time and it costs about �390 inc. VAT, so its CHEAP.
Here's a thread on larger screens:
http://forums.overclockers.co.uk/showthread.php?s=c006b0599b494a26dd6fe9d3db3767a8&threadid=17299216
Here's a page with all the screens you should consider in any size:
http://www.overclockers.co.uk/acatalog/Online_Catalogue_Monitors_17.html
The screens that are currently generally considered best value for high-quality gaming Lcds are:
LG 1715S 17" LCD Monitor - Silver
costs only around �210!! dirt cheap and very highly respected
Hyundai ImageQuest L70S+ 17" LCD Monitor - Black/Silver
costs �230, which is cheap, and 12ms responce time makes this one of the best 17" monitors money can buy.
Sharp LL-172G 17" LCD Monitor - Black
�260, but if you want an all round screen, this is probably the classiest, and the most comfortable to look at i've seen for a 17".
Viewsonic VX715 X Series 17" LCD Monitor - Black/Silver
only �220. I've never seen this screen in person, but if its anything like the 19" screen that i own which is in the exact same style, it'll be awesome. It's only slightly let down by its response time which surprisingly is twice as slow as the 19" version.
hope this helps...