Dell UltraSharp U2410 24" LCD - $179

I have been using this monitor for years. Great unit. IPS display, built like a tank. Tons of inputs. I've purchased several of them since they have been available for around $200 used. It would make a great setup, esp if you wanted to have two of them.

http://www.usmicrocorpretail.com/p-1045-dell-ultrasharp-u2410-24-lcd-hd-flat-panel-wide-screen-monitor.aspx

Are there better monitors available? Sure. But not for $179 refurbished! Is it 4K capable? Hell no. Do you need 4K? Probably not. I've purchased a lot of stuff from US Micro, they are a good seller and pack pretty well too.