\bolton's are much for performance so your looking sound.
but Arata/yoshi/akropav have great success with their full systems so its up to you. you'll just have to do a search. as far as bolt ons, i've just always got them off of ebay.
i think everyone has them because they provide good bang for your buck. lets be real, they look nice, sound good, are good quality, and theyre priced reasonably.
Are you serious? take a look any yosh ad and what brand bike do you see? a Suzuki- they have a partnership together, sure they also work with other brand bikes but the R & D (research and Development) is mainly done on suzuki's. Show me one ad that yosh advertises another brand bike? I've never seen one-all suzuki's. I think you need to do some more research.