I loved OFP. I love ARMA 2. I only played the Demo for Arma 1. ARMA 2 seems much more polished, however, again, I only played the demo for ARMA 1 because it turned me off. It was clunky, ugly... I really was scared that BIS was done for.

ARMA 2 is fantastic I think. Maybe its just ARMA 1? Try the Free ARMA2 or Demo...