The QNIX QX2710 LED Evolution II is an awesome monitor. It's 27" and it's over-clockable! I've had one for over two years, running at 96Hz without a single dead pixel. It uses a Samsung PLS planel (similar to IPS). Apple likes the panel so much that they use it (yes, the exact same one) in their $999 Thunderbolt displays.
The cons (most of these are features I don't miss at all):
-Only has ONE input in total: a DVI-D, which your 1080 has. The lack of electronics in the monitor are what allows it to OC (mine will do 120Hz, but I backed it down because one corner of the panel was darkened- no idea why. At 96Hz it looks perfect)
-Not exactly a Dell-quality stand. Can be replaced if it really bugs you, I got used to mine.
-Lousy speakers- but if you're into gaming, surely you're not using the built-in speakers anyway, right?
-No on-screen display- adjustment can be made through Nvidia control panel anyway. It does have buttons for brightness on the fly.
One reviewer said it was the best calibrated monitor he'd ever tested right out of the box, so you probably won't need to do anything anyway. The good news is that it's only $248 with free shipping on Newegg. It's also sporting a five star rating out of 102 reviews. Check it out, read the reviews, and consider it. You won't find a better picture out there for 1440p, and being OC-able is pretty rare and cool.
http://www.newegg.com/Product/Product.aspx?Item=9SIA4JH1GM6846&cm_re=qnix-_-0JC-0009-00007-_-Product
Link to independent review: http://www.technologyx.com/featured/qnix-qx2710-27-2560x1440-monitor-review/
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