stock or kitted set-up??
if you're running near stock, there's no point in spending for the treat pipe, rock a biturbo.
however if you're churning some RPMs with a kit, the treats pipe is a clear winner...
wider powerband and expansion chamber, quieter performance, baffle won't rattle off on you one day, and it's definitely on the prettier side of the pipe spectrum. has my vote all day, i've got one on my minarelli v1.