cjl :
As for 60Hz? Congratulations, you just stated the most useless spec ever - 60Hz is far faster than the eye is capable of noticing anyways.
Sorry, but I'm just browsing around (looking for an LCD with best response and least amount of input lag) and I read through this thread.
I've been playing FPS games for over a decade (almost entirely quake series). I always had the envied twitch aim and fast reactions times. Even though I barely play them anymore, I still have better aim and playing ability than 99.9 percent of the gamers out there. I mention this because I have always noted a significant decrease in playing ability, reaction times, missing shots (if the crosshair isn't where it displays on the screen due to input lag and response delays...; true, a lot of my aim is reflex based and muscle memory, but the eye does play its part), etc when on LCD. I am not a random noob who can't play well. Even on LCD I'll still be nearly unbeatable to the majority of players simply because I have the game logic and controlling attritbutes required of a good FPS player.
The quote in question here I find ironic, since it is what is useless. Even though the majority of humans don't notice much of a difference going from 60 to 120hz, you shouldn't say 60hz is far faster than the eye is capable of noticing. That is incorrect. If you reword it, perhaps I could let it slip -- say if you were to say 60hz is good enough for presenting a smooth motion. Pilots have been tested at recognizing and giving details on images flashed at over 200fps. This means the human eye is capable of "noticing" things faster than 60hz. Maybe not the average human eye, but just because you don't fall into the category of a minority of people doesn't mean you should say it is absolutely pointless.
I don't particularly care for cake -- something which probably puts me into a minority -- but I don't try to sell my opinions as fact. In my opinion, chocolate is good -- something which probably puts me into the majority -- but I don't try to sell this opinion as fact simply because most people would agree... I think you get the idea.
Why am I looking for an LCD? Not for FPS but for racing. A nice widescreen LCD has more benefits in the racing genre where response time and input lag (at least on the monitor end) don't have nearly as big an impact as in FPS. Granted, I'm not an upper echelon racer -- mediocre at best; whereas in FPS I am upper echelon. So who knows, maybe the top racers, if given the chance to experience the benefits of the CRT monitors' near instantaneous response (as far as displaying what has been received) would prefer it.
Also, I prefer programming on widescreens and LCDs as they seem slightly easier on the eyes (although the only "evidence" I've seen for this is anecdotal, personal experience is what counts here).