I might be in the market for an external display for my Early 2011 MacBook Pro (specs below), and I wanted to consult you nice people for opinions on the best options. Because of hardware constraints (I don't believe my machine can do 4K), I am probably looking for 2560 x 1440 on a 27" (or something similar). Most of the time, I would be using it as my only display, with the MBP in clamshell mode. I don't do any gaming. IPS (or possibly PLS?) is a must, and low cost is a priority (without getting shoddy quality). Built-in speakers would be nice. Thanks!