yea, i hear all about that ghosting and crap, but honestly speaking, the effect is pretty much non-existent on good lcds and you have to be pretty anal to markedly say it affects your gaming.
you should get my monitor. its amazing.
dell 2000fp. its a 20" lcd. i used one of those 20% coupons stacked with some other shit to get it for $1100. Although, I did buy it a year ago. I think now you can get it for around $600-750 depending on the coupons you can find. ars technica even recommends it for their "god-box!" hehe
http://www.cadonline.com/reviews/hardware/0402lcd/dell.htm
http://www.cadonline.com/reviews/2002allstr/2002allstr.htm
http://forums.anandtech.com/messageview.cfm?catid=31&threadid=994560&STARTPAGE=1 (a few comments on it)
http://forums.anandtech.com/messageview.cfm?catid=31&threadid=1029893&FTVAR_MSGDBTABLE= (person just bought it and agrees no ghosting)
http://forums.anandtech.com/messageview.cfm?catid=27&threadid=1041300 (another long thread with more people saying how much they love it, with voting enabled.. hehe)
http://people.cornell.edu/pages/jhh25/stuff/lcd.htm (great page for lcd discussion) - aggregation of hundreds of comments about lots and lots of LCDs.
btw, if you read a comment about ghosting on the 2000fp, read more into it. 1) most of them are idiots running analog where of course the response time is they're just looking for some stupid reason to whine and bitch and 2) what some of them describe isn't even ghosting. idiots. hehe
I've owned 4 lcds and 3 trinitron monitors.
1) Sony 200ES - 17" Trinitron. I used this in college, and I had some issues with it going dark, then slowly brightening up after a couple years.
2) NEC 1500M - 15" LCD. My first LCD (cost about $1200 before discounts), it kicked major ass. No ghosting, 1024x768 native res, good 300:1 contrast (hey it was awesome at the time).
3) Mitsubishi Diamond Pro 920 - 19" Trinitron/Diamondtron. This is what I have in my office. Its alright, but I'm spoiled at home with my 2000FP.
4) Dell 1800FP - 18" LCD. This is the monitor I have at my office at my weekend job. Its a beautiful monitor... but it doesn't beat having 1600x1200 native

(only 1280x1024 native).
5) Sony 420GS - 19" Trinitron. My old monitor at the office which was replaced with the Dell 1800 FP. I really liked this monitor when I first got it 4 years ago. Now, its pretty unimpressive.
6) Dell 1502FP - 15" LCD. These guys are alright. I bought 7 of them last month for everyone at the office (my weekend job managing IT at a small company). Around $200 each, it was about the same price as decent 19" trinitrons with like 10% of the floorspace. Plus, LCDs reduce eyestrain by basically reducing flicker to zero.
7) Dell 2000FP - 20" LCD. Its fucking amazing. I have a VCR wired into it, so I can have picture-in-picture tv going at the same time as my video. It can have 4 different video inputs, and picture-in-picture swap between 2 of them. composite, s-video, dvi and analog in.
to comment on what other people have said, yes, lcds typically have a "native" resolution, i.e. they have a fixed number of pixels, and when you scale to an uneven resolution, its hard to convert 3 dots into 2 dots effectively (lets say the 2 dots are red, and blue... how do you draw that color information into 3 pixels? some crappy lcds will draw that as 2 red pixels 1 blue pixel, the better ones will draw it as 1 red pixel 1 purple pixel 1 blue pixel) For the most part, the better lcd screens, like this one, have internal anti-aliasing/smoothing to correct many of those issues.
I play counter-strike at 1024x768 no problem, and it looks great. And I'm honestly and consistently posting bad-ass scores on my server still.
http://cs.myice.net
if you play counter-strike and wanna check us out.
daoc I play at 1280x1024 no problem.. sometimes I play in windowed mode when i need to open 2 windows at once.
back in the day, when i was pulling mad bots on guin (pink can vouch), with daox, I was running 3 windows, all at 800x600 each, with a 800x600 web browser open to camelot herald to lookup potential victims which i'd alt-tab with mirc to talk trash real-time
merc with speed bot and buff/resist bot in tow. hehe.
anyways in conclusion, 2000fp is the god monitor.
1800fp is also good if you want something smaller.