Yoshi and D&D usually sound awesome IMHO
I don't particularly care for the sound of the Scorpion but each to their own
Sound is generally down to length of can and how much restriction is in the bore of the pipe. Exup are a bit odd in the fact you don't get to hear the true sound of its tone until it's at higher Rev range.... The closed valve muffles the tone at low revs making it deceptive