Hmm, they all sound good. Fabspeed and Akrapovic are both about $6k and are valvetronic. Meistercraft is like $5300 without valvetronic and $8700 with valvetronic! That seems way disproportionately high. What am I missing!

Anyhow, I lean toward Fabspeed from what I heard. Might sound a smidgen more exotic than Akrapovic