I personally have the 550D. It is a wonderful case to work with and I have all kinds of great things to say. I do not have any experience with the fractal however in looking at the newegg pictures, it as well has great cable management, great drive space, excellent design and build materials. The 550D has the usb and buttons on the front and the fractal on top. Both good places. the only thing I can see the 550D having over the fractal is the fan blanking plates. You can remove them easily and then use fans galore or cover up the fan holes and reduce noise even further if you are not using those locations for airflow. I an not OC'ing anymore. Inside this case is the 2009 Xmas Grand prize. (i sold the 800D case to my bro. in law) and the only fan locations i'm using are the bottom up, front and back. sids and top are blocked off wiht the panels and its totally temperature stable and dead quiet...or it would be dead quiet if it werent for the Corsair RAM fans going out on me creating a small vibration.
The price difference tho?...get the fractal. Quieter fan use will make up the difference and it's great as well.
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