That looks like a good option - I may be in the runnings myself at some point. Would love to know what exhausts other Focers have gone for - worth making a new thread?
I got a Motad Venom. Excellent built quality, removalble baffle, nice sound. But cosmetically bland, I feel. The pipewerx is a bit more sportier and the black would suit my bike better as I've painted my swing arm, forks and yoke black, got Renthal Flat Black Bars, and have a black top box as well. Considering selling my Venom for £60 to offset half the cost of the Pipewerx can. Or else like Ben above, I might chop mine down to a stubby.