The poll isn't working.
anyway, tough choice, they are both similarly ranked. For your goals of energy/entrepreneurship I think McCombs has the clear advantage. Actually they are among the top of any program for energy and entrepreneurship. But both schools are more regional in recruiting and placement, so McCombs typically places a majority of grads in the southwest whereas Kenan Flagler places typically in the mid atlantic which sounds like a benefit to you.
As far as the Austin vs Chapel Hill I'd definitely say Austin is a better place to spend your two years. The city is great. Are you wanting to live in the mid atlantic right after school, or just some time down the road?
Personally I'd pick Texas, especially with the bonus of the scholarship. You might have to do some footwork to get back to the mid-atlantic but I think their ties to the energy sector would be a huge benefit.