Having made a newbuild in an R3 for a friend, I can say that they're a joy to work in, with heaps of space and nice solutions for most things. There are two problems I noticed, however. Firstly, the panels are pretty thin - 0.6mm as I recall - and for me this meant that I bent one slightly which made it difficult to put back on. Might have just been me though. Secondly, the rubber lining on the cable routing holes is crap. It's loose and comes off easily.
Other than that, really good case and very good value for money. It's really quiet, though my friend took the side opening off to stick another 120mm fan on, which unfortunately has the side effect that his dual 6950s are quite audible.
I'm going for a Corsair 550D myself.