I am looking for a new monitor in a very limited price range. Which one of these two have better picture quality? Also, I am currently using a Dell 1901FP, is the new monitor going to be worse? Basically I am asking whether my new monitor should be my primary or secondary monitor.
http://www.amazon.com/HP-2011x-20-Inch-LED-Monitor/dp/B004G8QO5M/ref=zg_tr_1292115011_7
http://www.amazon.com/VS228H-P-21-5-Inch-Full-HD-Monitor-Black/dp/B005BZNDOO/ref=zg_tr_1292115011_18
http://www.amazon.com/HP-2011x-20-Inch-LED-Monitor/dp/B004G8QO5M/ref=zg_tr_1292115011_7
http://www.amazon.com/VS228H-P-21-5-Inch-Full-HD-Monitor-Black/dp/B005BZNDOO/ref=zg_tr_1292115011_18