D14 will fit, iv seen several builds with it. Things to take into consideration with this case:
very long video cards like the 5970 just fit, and only when u remove the fan grill from the case.
the length of ur DVD drive can be an issue. the top bay only accept short drives and when running Crossfire/SLI you may have issues with the length of the drive in all bays. using 90 degree plugs seems to help. These imgs from benchmarkreviews.com shows what I am talking about:
other than that its a kick ass case imo