I am ordering my parts tomorrow or Saturday and I am having trouble deciding between the two. I want good cable management and since I will be right next to the computer and I am in a small room, I want it to be as quiet as possible. If you have any other suggestions for the same price or less I would be happy to hear them :)
here is my part list: http://pcpartpicker.com/p/1A29J
Also I will be adding a Noctua NH-U12S cpu cooler so there needs to be plenty of clearance for that
The bitfenix will be quieter overall, but will run hotter than the Arc Midi. Also, the arc midi will let you show off your sexy parts, if you wish to do so.
Also, a little off topic, but you should spend the extra $5 to get the Asus M5A99FX Pro if you ever plan on SLI. If not, then there's no difference really.
1. I own it, and I can say that the case is absolutely fantastic!
2. It's very well built, and Fractal really did not overlook anything. Great cable management (1 inch of space plus durable rubber grommets), dust filters on the front and bottom, 140mm fans all over, support for 2 240mm thick rads, rotatable and removable HDD cages, and it's also very quiet. Can't recommend this case enough, my only gripe with it is it's lack of support for 280mm rads, but other than that, it's fantastic!