I don't recommend the 560, get the 460 because it has better performance.
I don't think you should talk until you actually know what you are talking about.
BTW, a 700w PSU is absolutely AMPLE for nearly any single video card system on the market today. Make sure it's good quality. You could run that system quite easily off a 550w, however 700w is probably the sweet spot because most PSUs run better then they at are about 50% load.
Get the 7850, it's the best performing and quite power efficient.