If I had a 21 incher I'd love it too.
Seriously, I do have a 21" Cornerstone c1001, and it's great, I don't think you can beat it for the price. And their service and support is outstanding as well. The first one they sent me had a slight defect, and they had someone deliver a replacement the next day (I went for the on-site). All through it they were responsive, polite, and any time I've ever sent them an email they answered it right away. The replacement has been perfect (since June).
And no, I don't work for them!