Of course, keep in mind that, if you try to return multiple monitors in a row, you may start to run into issues with customer service.
Not saying that you plan on doing so, but there have been others in the past who have exchanged 3 or 4 TVs in a row, two weeks apart each time, and ran into issues the 5th time they tried to return/exchange one. Stores tend to get a little bit less-than-pleased about that sort of thing, which is why they have display units on the shelf/wall.
But a one-time return/exchange is rarely a problem if done within the return/exchange period.
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*disclaimer* I am not now, nor have I ever been, an employee of Best Buy, Geek Squad, nor of any of their affiliate, parent, or subsidiary companies.