Section 110 will give you the luxury of being both close to midfield and close to the end zone as well. Our seats were on the 30 yard line and that was for the Miami Dolphins game back in 2009. We were in row 14, seats 7-9.
I have had seats on the 50 yard line before and the view isn't much different from section 110, I promise. The seats face straight ahead so when the ball is down near the east end zone, you will have to look left slightly but not enough to annoy you.

I know it's cliche but there aren't really any bad seats at Bank of America Stadium. Upper level seats come equipped with a nice view of the Uptown Skyline. The upper levels just require a ton of walking but the tickets are much cheaper. No real downside aside from the constant walking.