Been here for a few games. The C sections would be really good. While the stadium can hold 65k people, it actually is not that big area wise. All the seats are close to the ground (compared to other NFL stadiums). They designed to give it an intimate feel.
In case anyone is interested, here is the seating chart for Levi's stadium. Snagged some C136 and C135 tix for $175 + TM Fees/each.
Got some Field 23 for $175 as well. Got rid of them as its about 80 yards away from the stage... horrible luck with Field today.