if you are set on a 27" monitor i would take a look at the "catleap 27" korean monitors... they use the same panel used in the apple 27" cinema display and dell 27" ultrasharp which cost over $700. you are playing a bit of a lottery since there is no dead pixel guarantee and no international warranty but most people who it seem to be pleased for the price. i know i would personally have a couple of dead pixels on a superior IPS panel over a cheaper TN panel which has issues regarding color accuracy, backlight bleeding, and poor viewing angles. if interested just search for "catleap 27" on ebay

at $200 limit for your vid card, its down to either the radeon 7870 or geforce 660