It's your choice really,shape design, I have a Motad Venom can which isn't loud but louder than standard & with the baffle out burbles nicely when weaving in traffic, most I find only get loud when giving it the beans, even though not the best sound there are a few videos of different exhaust cans,but all the makes you mention are well known, delkevic get a good shout. Had a mate cut down a OEM can a few years ago all the baffles inside fell apart it wasn't great & in the end he bought a new can instead.