Cutting the cans and gutting the bs out of the center will get you a different sound and you loose some weight...for next to nothing on a price tag...some tools and your time to do the job. A steeped header back exh would be much lighter and a bit of a power tune based on a specific brand making their system their way. Take the exh off at the x pipe and drive around...or at least fire it up for a few seconds and have a comparison to when you cut the cans....while they are off the bike you could paint them and different color if that is also worth doing for you...