I just bought the UAII, and built it in a day as well.
It is really very sturdy, and very large!
It can handle up to a 27inch screen, so it can very easily handle your 19inch monitor.
Well worth the 600 bucks, as I, like you, don't have the space or time, (or the skill) to build
your own from scratch.
Shipping was 120 bucks I think, but considering its like 145 pounds, thats not too bad.
(4 boxes @ 40 pounds, and a small box at 5 pounds)