I want to hook my rMBP up to an external display...

I want a 27" display but I definitely don't want to pay the premium for a Thunderbolt display so I'm looking for some suitable suggestions. I just want it for a little bit of gaming so I don't need anything super fancy.

So far I found this hp one i quite like (mostly the look of it)

http://h20386.www2.hp.com/CanadaStore/Merch/Product.aspx?id=C4D27AA&opt=ABA&sel=MT

It's $350 and that's probably the max I want to spend.

Advise me!