I've not heard of a Scorpion Y pipe but I'm sure there are compatible models out there.
Scorpion to me is the best blend of cost, noise and looks. There are better zorst out there but you'll need more dollars.
Cobra is another option but apparently quite droney, K1 is ear bleeding loud, ebay copies are cheap/cheerful and will do the job but need a few mods to make them fit.
I've just done 7 days round Europe with a Scorpion and its nice and quiet when cruising but loud when you give it rizz.