I have the same monitor and i think its fine but that just my opinion if you want a higher contrast look at this: http://www.newegg.com/Product/Product.aspx?Item=N82E16824260104&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=3938566&SID=
If you have a well lite room, or are next to a window it can get a bit irritating i guess. That previous ASUS model i posted from amazon is 140 for the 21.5 inch and is not that glossy.
pixel frequency is how many pixels appear on the screen per second, the amount of what it should be varies from the type of display to supported frequency.