Hello to everyone who reading that post !
After calculating the costs and profits ;-)
we decided to go with TWO 750 W power supply for each D3 ASIC.
Some more info about PS ....
Packaging is very good, also wires and connectors !!!
I think, we found best price/quality/wattage ratio with this PS from EVGA !!!
We bought 4 of them. This is the minimum to run two D3 ASIC miners.
Computer store also gave us some discount and we come up with nice price for our "combo" !
Thank you for reading !