With a 60 degree, for me the lower bounce the better. I had a Spin Milled Vokey with a higher bounce (that got stolen). I made sure to get a lower bounce...seems to make chipping easier with less bounce. You need bounce for bunker shots, though (56 degree typically).
I agree that bounce is needed for the sand wedge because it will help you get out of the sand but not as needed for the lob wedge. The 4 degree will probably be the better choice.
the guy at golf galaxy suggested an 8 bounce on it since i said my home course is easy (Indian Boundary Golf Course). he said it works better with my swing also. bought the 8 bounce 60 degree vokey spin milled. hopefully i can spin it back like people say it does