Less expensive than Infield seating is seating down the line. These seats will get you just as close to the field at a fraction of the cost.
Sections 142-147 will have the sun behind them for late afternoon and evening games, while 116-118 are great for seeing the skyline over left field.
If you want to see the big board in center field, choose sections closer to the infield. Like infield seating, the last row in these sections is 41 and each section has wheelchair accessible seating.