I've no issues at all w/ my Yamakasi 30" IPS ($300~400). Got it on ebay, straight from Korea, looks a lot like my old iMac's IPS but it's matte (and not 27"). 2560x1600 :). I've had it just a few months now, not quite a year. I've also got 3 thinkpads but I can't recommend those screens :(.
Also, if you haven't seen fonts on a glossy Retina display, visit an Apple store. Fonts at that resolution just look different/perfect in a way that's hard to express.
I've had all kinds of multiple monitors setup. My last setup was a 27" iMac plus a 30" Dell monitor.
However, since I got my retina MacBook Pro I find myself more and more exclusively programming on the laptop.
The screen is great and the text quality superb so I enjoy it more.
I use 2x Dell UltraSharp U3014 (2560x1600 at 60Hz), I would recommend this monitor only if you want a big resolution and great, rich, vivid colors, it’s IPS though. Avoid any version previous to A03.
2x HP LP2475w. They are 1920x1200 / 16:10 IPS panels with pivot/tilt/rotate stands and a bunch of inputs.. They're a bit old, but look great and can find them used for ~$150.
Yeah I would definitely go for a nicer IPS display vs. a larger TN one. I switch between a cheap TN monitor and nice IPS MacBook display a lot and the IPS display is so much easier on the eyes. The TN panel looks really harsh, especially with white on black text.
I actually just received this one. It was listed for about $150 by Amazon with supposedly damaged packaging but everything is perfect and I love it! Thank you.