My Apple monitor needs replacing. Any recommendations on third-party monitors?

My old Apple Cinema Display isn’t looking as good as it once was (there is a distinct dark vertical area on it). LCDs aren’t supposed to get burn in, but mine has something wrong with it. I’m considering a third-party monitor, since Apple’s are so expensive. Does anyone have any recommendations on monitors that are compatible with a fairly new MacBook? I want at least 23”. Also, when you recommend something, please let me know if any kind of video adapter is necessary.