The cable length should be fine, I have that case, which is excellent BTW.
May I suggest this PSU, whats nice about it is that you only use the cables you need, the ones you don't use you do not have to attach, which merely consists of plugging them in.
http://www.newegg.com/Product/Produc...82E16817103941
I have the 500 watt version, it is great, quite and efficient.