If you think you have bad colors now, the 120-140Hz ones are worse. TBH, I cant recommend them. Sure they're smoothe like the old CRT's but god damn they look like ass.
I use one that is a model older than this one but nearly the same thing. Its 16:10 1920X1200 which is superior to 1080P. Streaming or not, it still has a much better usable screen size and dont get stuck on 1080P as 4K is coming. It is also using the latest IPS panel (AH-IPS) so color reproduction will be very good. It is Asus's PA series which is their Professional line of monitors so quality will be a step up, i know mine is built like a beast. The difference you'll see compared to a TN panel will blow you away.
http://www.newegg.com/Product/Product.aspx?Item=N82E16824236332
The other option I'd look at is a 2560X1440 monitor. If it were me buying a new monitor today I'd seriously consider this route. It is harder on the video card playing games but oh well. The panel will still be IPS, but probably not quite as high a quality as the AH-IPS, but the res would be so nice.
http://www.newegg.com/Product/Product.aspx?Item=N82E16824009553