i dont have any of the above on my car yet
but my bud got the GC'z with KYB'z and his rides nice if i do say so myself.
he first got the coilovers and installed them on stock shocks. he dropped it like 4 inches at first. at that time the ride kinda sucked. but when he got the KYBs and adjusted it to be stiffer it rode great!!:thumbup: and it handles great.

so i say go with coilovers.

my .o2