Cant Choose between these monitors

[MrGrievous]

OK so I have gone and compiled a list of monitors (done a lot of looking around) that I think are really worth looking at. The SAMSUNG S27A850D which looks lk a really nice monitor, but the price of this thing is really high; which makes me consider the possibilities of a Apple Thunderbolt for just $100 more. Next on the list is BenQ XL2420T and finally the CROSSOVER 27Q LED-P 27 has me really interested.

 

[MrGrievous]

I would prefer to spend no more than $600 and it will be used more for gaming than anything else, am open for other suggestions too.