That's why the first recommendation I made was for what is widely regarded as being one of THE lowest input lag monitors, period
Plus, it's eIPS so the response time (pixel response time) is a good "compromise" between that of the overdriven TN panels and the higher end 8bit AH-IPS panels
I have personally never noticed a ghosting issue on any of the U2312's I've used or owned, never a dead pixel either, and every one was built way better than the $180 price tag would suggest; frankly, I can't think of any other monitor in that price range (aside from the Dell Professional series, which don't count because they use "binned" TN panels but are otherwise identical to the same screen size Ultrasharp; literally the panel is the ONLY difference) that has height, swivel, and tilt adjustment with a very solid VESA stand, something that is a huge boon if or when he/she decides to go Surround (3x$180 for portrait Surround is a LOT cheaper than 3x$180 and then having to buy a good triple arm mount or three individual mounts!!!!).
The Qnix/Xstar recommendation was based, in fact, specifically on your high praises for the displays; I've only used them briefly and can't give an honest opinion on them.
The mention of the LG 1080p AH-IPS displays is because, well, they're very inexpensive for what they are, and they have very good response time (5ms or so; NO ghosting!) with very low input lag if you choose a dual-link DVI-D input only model. Furthermore, they have a truly ideal AG coating; I would say that if the older Dell coating is a "70% AG", the LG's are like "~15-20% AG", in that you get the benefits of the anti-glare, but the picture looks ALMOST as good as a glossy display (that vibrant, pop-out-in-your-face kinda picture).
At the end of the day, $180 (or less if you catch one of the MANY frequent sales) for everything the U2312Hm offers makes it quite frankly the best all-around display under $200 or so, and I have used/owned a LOT of them. If 1080p, great colors, no glare, 22-24" size, industrial build quality, effectively ZERO input latency, no perceptible ghosting, and what is quite likely the best warranty for consumer displays, bar none, appeals to you.... I don't know of anything else that comes close!
(Oh, and the Dell's CAN overclock, it's just hit or miss; heck, I'm typing this from my P2212Hb, which I love for its very high pixel density, and which I'm currently running at 75hz with no frame dropping, and after replacing the cheapish Dual-Link DVI cable with a 22AWG quad-shielded Tripp Lite 10' DL-DVI-D cable, it will go to AT LEAST 96hz without dropping frames! That may well be its limit, I don't know, but I do know that it's plenty for me! *I know it doesn't drop frames thanks to a high speed camera borrowed from a friend: 1080p video shot @ 240fps or 720p @ 600fps; unfortunately I don't get to keep the camera