I wanted to see what everyone's favorite type of fan was. I just upgraded today to my Phantom 820, and the Nzxt fans in that case are absolutely amazing. I had no idea how different they could be. The noise and airflow are just great on them. I've learned a valuable lesson in that CFM and noise levels only mean so much from the manufacturer's spec page. It's only when you have them in your room that you really know what's great and what isn't.
That being said, obviously, I love Nzxt. Especially their FZ series. Also, as much as I dislike the color schemes, my Noctua fans are downright amazing, and both brands easily top my favorites list.
I'll give a shout out to Xigmatek for at least having purple LED fans, even if they aren't the greatest.
Also, if you want to check out some shots of my new case, I updated my build log with the Phantom 820.
Build log, My first system designed for cpu overclocking -AMD990FX