Hello Evo World

I'm interested in purchasing a final drive for my 2013 Evo X. I currently have a ETS 6266 Turbo kit in the car and I in the process of having a built motor put in. My goal is high 600's. I want to use this car mostly for the street and at times go to the track for a 1/4 mile car. I wondering if you guys have any experiences with these products and what are your pros and cons about them.

thanks