My personal preference is the looks of the original (non achropovic) silencer….but I know beauty is in the eye of the beer-holder or something like that.
I wouldn't want my r1300gs to be any louder than standard as I know noisy exhausts upset lots of people, and I’d prefer to ride stealthily …. Had loud pipes in the past but now I think I’ve grown up a bit and just find them annoying. ( old fart here)
Each to their own, and if you want loud pipes, go for it, but don’t be surprised when you get a pull from the police…. And if in Germany or Switzerland, expect a large fine!…..and noise cameras are coming to the UK!