Ample wattage, and it does come with 2 8 pin PCIe.
Upon Googling it I found a thread that described the cables as "horrific, especially the PCIe cables". They're apparently very inflexible and hard to work with.
Do you plan on SLI ever? If you do, the supplied cables won't do, even though it is high enough power.
I'd recommend the Corsair AX860 (non i, that's a waste of money) if it's within budget. The cables are nicer, and it's supplied with enough cables to support SLI.