I would say a clear NO for 22" monitor. Reason:
1) It has the same resolution that a 20" has.
2) 2" more and you get a fullHD (1080p) supported monitor, which does not cost much when compared to 22"
Three days ago I bought Dell 198WFP. Searched a lot and took this one, reason being
1) A DVI port on this monitor
2) 1000:1 typical contrast ration
3) Breathtaking color reproduction.
4) superb contrast.
Don't fall for 1908WFP. This one, though has extra usb ports etc, fails when it comes to performance. Lack contrast and sharpness.
Samsung's monitor with inbuilt DVI port costs around 12k and Dell 198WFP costs around 9,800.
Don't go for Viewsonic as digitiians are reporting failures and lack of performance for these.
I don't know much about acer and other manufacturers.
You can also check the 20" Dell monitor, model number I think is something like 2008WFP. This one costs around 12k.
If your computer does not have a DVI port, you can go for the following:
1) Dell 198WFP
2) Samsung 932nw or 940 nw