Heck, if you're thinking of the 955, why not spend a bit more on the cpu and get the 1055T? The extra cores will make a difference, at least I've found it makes a difference in performance.
If you want a hot swappable case as xlilmissmjx mentioned, if you don't mind the look, I own the HAF X, and it works well for both cooling & cable management and is easy to work in because of its size. It also has the USB 3 ports on the outside.
The modular psu is much better for cable management and less clutter from unnecessary cables.
