The Acer, in my opinion, is going to be your best buy. I have had acer brand stuff for years. In fact, my first computer was an Acer Laptop, which I loved beyond all.
Acer is a great company, and their LCDs are wonderful quality. The 22" is sleek as ****. It's bright and very high def. The text on screen are very crisp, and the colors are absolutly spot on. I honestly couldn't ask for a better screen for that kind of money. Obviously there are better screens out there, but who needs to pay 500+ for slightly better quality?
It's packin a 5ms response, which means no ghosting at all. Don't feel it's a lower quality in comparison to a 2ms, as 2ms is way overkill. Sceptre has a good reputation, and I wouldn't disagree with one of their 19" or the 20.1", but IMHO the Acer 22" is better, hands down.
Customer support couldn't be better. It's like the oposite of Asus (haha). Whenever I had trouble with my laptop Acer would be happy to help me out.
Great buy, 5 out of 5 eggs no doubt