I am a big fan of the Quartz! Particularly Silestone. At work (I work for a local real estate developer), we've been using Silestone for years instead of Granite, and all of our clients rave about it! I've also had Silestone in my townhouse and love the durability and consistency of it. I personally feel that it gives a kitchen a cleaner/sleeker feel. In my new house, we just reno'd the kitchen and used granite ( only because we were on a budget & couldn't afford the Silestone =( ) and although it still looks nice, one of the things that bugs me is that there are "flaws" in the stone. For example, we've used a nice rich grey coloured granite which has black flecks in it. However, there are many bronze/copper marks in the stone - of course because it's a natural stone, but it throws off the colour, and we had no way of foreseeing how many of those marks there would be.
As for Brian - I looked at your link and I do agree that the cement is also really cool! Thanks for sharing that.