Rural QB map (dunno who's made it) is great for PBEM. My PBEM-friend and I just begun the second PBEM-game on that map. The first game was won by Syria (for the first time EVER in our Shock Force PBEM-history).
USA: 1 x Styker Infantry Battalion (minus one company © and only the M1130 and the M1131 Strykers)
Syria: 2 x Special Forces company + 1 x Mech Airborne Infantry + 1 x Recon Company.
The Airborne Infantry was a reinforcement arriving at 10. minute.
Small alterations for game #2, seems balanced enough at the time (at the 5. turn).