I also love my Acer monitors. I currently have 2 of them and they beat out the more expensive LG that is also a 21.5"
Between work and home I have the following monitors (then I'll rank them by order of which I like most): 1 Dell 19", 1 LG 19" wide 2 Asus 21.5" (one is LED), 2 Acer 21.5". Of those, starting at my least favorite is the Dell, then the LGs, then the Acers and both Asus screens top it off. My point? The acers are beating the more expensive, and usually higher quality, LG screens and are a very good monitor.