If you don't mind a refurb, you can get a HP ZR24W for about $150-$175. Also the LG IPS231B-BN are pretty good in a similar price though they do not have as nice a stand.
That BenQ you linked is probably not bad. It's a VA panel so it should be of a much better image quality than TN. I find it amusing that the 27" version would also be just inside your budget, but the 24" is not.