Most rows in section 321 have 24 seats with seat 24 on the left aisle (as you face the field). Exceptions include rows 5-9 where seats 1-3 and 22-24 have been removed for the section tunnel.
The Upper Level Sideline is the place to be if you're looking for an affordable seat with a traditional sideline view. The further distance helps to keep prices in the lower tier, however fans can still find very good views in the sections near the 50 yard line (Sections 317-319 and 345-347).
One benefit to sitting on the Upper tier is that you will be fully covered by the new roof above Hard Rock Stadium. Our favorite seats in the Upper Level Sideline are found in rows 4-6 as these keep you close the concourse entry tunnel, and provide good clearance above the safety railing at the front of the seating tier.