With the current gamut of high-definition television sets, I would suggest you have two options. The first is to go with a set similar to the one IC purchased: a Samsung 6000 or 8000 series. As IC mentioned, the refresh rate is 240hz, the contrast is phenomenal, and the reproduction of colours is generally true. With this being said, the reproduction of blacks still cannot contend with the most premiere plasma sets. While this seems a marginal difference at best, this quality can be made very explicit depending upon the medium (i.e., games, sports, and movies) and environment (i.e., positioning, lighting, etc.,) the the set is situated within. Obviously, then, second choice is premiere plasma sets. To this end, one is hard pressed to find a better set than the Panasonic V/G10 series: across most review sites, including C-NET, Consumer Reports, etc., the V10 is regarded as the best set currently available, and is only surpassed by the Kuzo which is no longer in production. In regard to the reproduction of accurate colours, proper gamma (white/black) levels and contrast, this TV remains "king," so to say.
The next issue of contention is one not many people factor this in when purchasing an HDTV - this is, that HDTVs are not generally "plug-and-play". In order to reproduce the most accurate and true colours - if this sort of things is important to you, that is - calibration is necessary. This means both menu configurations (i.e., brightness, contrast, refresh rate, colours, sharpness, etc.,) as well as gamma alterations, completed through a "set-up screen" not immediately accessible. Most retailers offer "professional" calibration, but the steps are generally easy to follow and can be completed from home.
Now, I mention calibration because, in my estimation, it remains one of the predominant reasons for "buyer remorse" after a set is taken home. At the store, the TV "pops" almost unimaginably, the images seem sharp and clear, and the the contrast is so amazing the images almost seem to come off the screen; unfortunately, many do not experience this same experience at home. Discounting psychological factors, this can generally be attributed to calibration - specifically, the way the retailer calibrates sets to be sold on the showroom floor. The sets are not only calibrated for clarity and accuracy, but also to produce a brightness not available in "home mode". (The mode they operate on is called, "store mode".) This mode cranks up the brightness to differentiate it from every other T.V., on the showroom floor. Ultimately, though, what is the relevance here?
Well, generally speaking, high-end plasma sets such as the G/V10 are more "color-accurate" out of the box than high-end LCD sets - it is simply a consequence of the type of set one is buying. This inevitably will alter your experience of the TV, particularly considering the room the TV is in, and your initial expectations. If you are viewing in a generally well-lit room, desire that "POP!" from your TV, and are willing to perform some calibration, than you should purchase an LCD. If you are viewing in a generally dim room, desire true and accurate performance from your TV, and feel that either a) professional calibration is too expensive, or b) are disinclined to perform it yourself, than you should probably purchase a plasma.
My recommendations are, in no order (series of TVs):
Samsung UN8000/6000.
Panasonic TCP-G/V10.
Sony KDL-XBR.
For less quality, but less price:
Samsung LNA950.
Panasonic TCPS1.
Also, remember that components (DVR, PS3, etc) and cabling can "make or break" a TV experience. A full HDTV source utilizing components (component cables, that is) as opposed to HDMI will look considerably worse - particularly if you are as neurotic as me when analyzing your own TV's performance. While this difference is insignificant on non (full) HDTV components, games being played on the PS3, for example, are significantly different as it pertains to components v., HDMI. And, as IC said, viewing SD television on an HDTV is a factor not many take into consideration, but one that may ultimately ruin your experience.