Boots? I'd go boots over shoes especially since fields can be really muddy in the spring or after rainfall. These are the boots I use. They're relatively inexpensive, durable, and comfortable with a pair of thick socks. They can be a pain to break in so I'd suggest getting a pair of boot socks.
For my black loadout, I went for a SWAT style loadout. You might be able to use something similar for PMC. I got this shirt and these pants. They haven't ripped with all my sliding around and are very breathable.