Hi - I am looking for a new 27" monitor. Currently using an old 23" Cinema display which is now a little small for my needs and starting to show it's age. I am torn between the Thunderbolt display and the DELL U2713H. The only thing that is putting me off the DELL is that every other review on MacRumors mentions problems with ghosting, or something called overdrive. This only seems to be happening to OSX users. I'd get the thunderbolt but the glossy display could be a hindrance for me; and it's rumored to be replaced soon, though from past experience waiting for Apple to update something that is well passed an update is quite a frustrating experience, so I don't see that as a valid option. I am professional graphic designer & stock photographer so would like something fairly accurate in terms of color, though I'm not super anal about it. Thanks!