For noise and weight reduction, the GP Style pipe from SC Project is the way to go.
They do a full titanium system as well, if you wanted to go the whole hog.
SC project slip-ons are very reasonably priced and reviews suggest the build quality is top notch. Being Italian, delivery times vary though...
Still, I like the idea of having a can from the same company that supplies a lot of bikes in MotoGP.
I'll be ordering the 'conic' pipe with the carbon tip soon. Very budget friendly and I'll probably have to leave the baffle in. I arrive home late st night often and it will be a while before I can get the bike remapped.
So, my Evo line Termi (full throttle) will be going up for sale.
Won't be loud enough for you but it is a big improvement over the standard exhaust.