I went into a completely different direction. Instead of getting sport secondary cats, I'm getting new headers with sport primary cats from Imagine Auto along with a Fabspeed secondary cat bypass. The cost for the combo is less than the Dansk sport cats and has the advantage of moving more of the weight towards the middle of the car which will help handling. Plus, the shiny stainless headers/cat, shiny bypass and shiny muffler from Che that I ordered yesterday will look good if I'm ever stuck under the car (j/k). The downside is that I will need to pull the existing header off and I'm hoping I can do it without shearing an exhaust bolt
I won't have time to do a proper dyno comparo, but I'll report back on my experience.