I have used the standard D5 pump before. It is a good pump, i know that.
The thing is.. Is it over powered? And is the DCP 4.0 quieter.
My system:
*Obsidian 550D
* Haswell i5 OC
* GTX 780 Ti (will upgrade to 980 Ti, maybe 2x)
I really don't think thick 360 + 240 slim + CPU + 1 GPU need that...