I Love my Ti-Force (Sumo) High Mount full system!!!
my mechanic was pretty impressed with it too. He's very pro about Acrapovic (installed several of them), but he said that the build quality and fit of my Ti-Force (first he's ever installed) was on par with Acrapovic, which is great because it was far less expensive.
The fit on the sumo is EXCELLENT. They've corrected the fitting issues the earlier versions had. Also the sound is VERY cool. Low throaty rumble below 4500 and a screaming/roaring banshee above to redline.
It also really cleans up the look of the Busa.
See pic below.