@stusdal: last time i saw at my local track, i cant tell any difference. SP can fight with KO.
my understanding after read all of these, not much difference in speed between those 3 speedos. it is only the matter of tuning option (KO=VFS, SP&SXX=more simple way), reliability, aftersales service, and also support from friends
glad to hear people here recommend KO. hopefully next week my BMC arrives.