hm.. well i think the bars need to fit the rider i mean honestly its all preference .....
i rode my friends slayers a bit i think they are sick but not exactly as good as the hype that follows or is going to follow PROTO/SR parts
and i rode SZ one pieces on my scoot for like 5 months i feel the ones i got were very strong but pretty heavy and not smooth with all the external reinforcement
i would have to place my vote on inward bars they are or atleast feel lighter than my SZ bars a little less bulky than the slayers, very smooth with no rough edges ect
also strong oh and not to mention they cost like 50 bucks
but hey support the sport however you want to...