Some feedback from someone running CMSF on a slightly lesser machine (1.5GHz Dual core, 1 GB RAM) - After battling my way all the way to "Suburb Hamah", I've had to give up. The game has been reduced to 1 frame every 10 seconds in this scenario. The huge numbers of vehicles and long lines of sight are probably the cause...
I've really enjoyed the battles that I've played up to this point, but have one or two small suggestions. In a few battles, reinforcements appear in regions that are under LOS of enemy units - nice fireworks when it's enemy BMP's under fire from my M1's...but it shouldn't happen.
Secondly, some of the maps are very, very flat. Some small variations in the elevation across the map would add to the realism, and give the player a few more options.
A great, challenging campaign - a pity I had to give up before the end.