I'm about to buy a Mac Pro with a 23" ACD - I use this setup at work and, as far as I'm concerned, these monitors are absolutely gorgeous and by far the best I've worked with. However, they are very expensive and I'd like to know if there are any known problems associated with them, both with build quality and performance. Like I said, my impressions of them are excellent thus far, and I figure there's little point in waiting for a produce refresh because there's little that can be improved, IMHO. Opinions?