I've got a 27Q and it is excellent. The housing is metal, the stand is solid (if lacking in adjustment, but other models offer more adjustment - I replaced it with an Ergotron MX arm). It's very basic - just a DVI port. Crossover has multiple models offering different stands and different connectivity options. The major unknown at this point is longevity, but other than that I would recommend this without reservation.
I have an Ergotron MX arm (one of the best purchases I ever made) supporting a 23" ViewSonic and I was planning to get one of these 27" monitors. How well do these arms support monitors that big?