3g's is prob to high huh? but yeah like you said on un even sufaces you really don't want to have to high of a spring rating. when I did run coilovers it would go into a turn relatively good but about half way through if you hit a bump or dip you could forget about keepnig your tires firmly on the ground thus running a horrible time or I've even seen some lose it and plow through a couple of cones.