If I was to fit a pipe, the only one I'd want would be the carbon, curly akrapovik. It actually looks like it has been designed to fit the bike, by someone who has an eye for detail. And being Akrapovic, you know it will be well built and run well on the bike. I wouldnt be interested in cutting the standard pipe in half and just fitting the end can.
I'm still waiting for someone to mod the standard can, on my old FZ6 it was common just to use a 30cm metal drill bit, and drill down the baffle tubes. Sounded much better, and the ECU is able to readjust the fuel mixture