there's no such thing as a good gaming lcd when compared to a crt. the things ghost bad and they look like crap when put outside their native resolution. i'm not saying lcd's are bad - i'd get one over a crt due to aesthetics anyday... but performance wise they just don't compare.
Ok some general info on why LCD are still not upto CRT's...in short its poor color reproduction and detail in bright areas and dark areas...i.e. LCDs have none.
Short answer, poor color reproduction, can't render black or white very well and so forth.
Flat Panel monitors still lack the abilties of a modern CRT.
Let me give you a general rule of thumb, then ill toss a few numbers your way
Rule of thumb: If you spend more then 30% of your computer time playing games, then a flat panel is a bad idea.
Ok a few things to know about flat panels. There are 5 companies that make screens for all the companies that sell them. The current top of the line panels are made by Hyundai (now called Hydis) BUT the panel makers do not tell you where they get their screens from so it is very hard to find this panel. To make it worse some companies will mix, say an AU optronics panel and a Hyundai within the same model number!!!
Let me do it this way.
BRIGHTNESS: A CRT produces 700nit of brightness.... the best flat panels are upto only about 400, and you pay big bucks for these. To simplify, this is what helps you make out details in shadowy areas, dark tunnels and so forth. Example, instead of peering into a dark tunnle and seeing darkly outlined bricks and mortar that fade off into darkness, you just see a big black opening with no detail.
RESOLUTION: Also flat panels should be set at 1280 x 1024 for images to look proper. at this resolution on a 17 panel text is small and hard to read. So you have to tweak the fonts, which can create headaches, literally, and end up with odd looking fonts. Or set it at 1024 x 768 at which point it is blury for images.
COLOR: the average flat panel only reporduces roughly 86% of colors accuratley. Often times unable to reproduce black and white accurately. Also you lose 5-10% of your dark shades (meaning areas that look like dark shaded grey bricks at night on a CRT, are just black boxes). The high end panels that can get over 90% on color reproduction are unable to play games. You get ghosting, after images, blury backgrounds that give horrible headaches etc. So you either give up color and vibrancy or give up games.
RESPONSE TIME: I cant stress this enough IGNORE THIS NUMBER IT IS MEANINGLESS!!!! ISO standards for Response time allow manufactuers to time only how long it takes for a pixel to flip from black to white (with no true end point indicating what you can say is truly black, thus what I say is a pixel in a black state you may say is still gray) Thus these numbers have no bearing at all on how quickly the panel can draw color images. there are 16ms monitors that can not handle games at all...and 25ms panles with little to no ghosting. Until this standard for measuring pixel color change reflects real world monitor use this number is a marketing ploy used to decieve customers into thinking a monitor is fast.