I like the plain old black finished stock type screws that I get from McMaster Carr. They last the longest and strip the least. The thing I hate most is the stainless steel screws. Frigin things strip when you sneeze on them and I dont use junk wrenches. hardened ground tip only.
I saw a guy at the track a couple weeks ago talking about how he rebuilt his entire buggy with an aluminum screw set he got somewhere, they were all annodized blue and how he saved so much weight and how great the thing felt on the track. YAP YAP YAP. You know th type. Anywhay he cased a jump pretty bad and the whole front end of his buggy went flying off. He actually snapped the screws that hold the diff case to the chassis.
You should have heard they guys givving him crap after he was talking so much about how "light" it was. After the crash all he heard was how much lighter it was without a front end.