help me pick my exhaust please
 

The exhaust I want is the mufflex 3.5 over the axel, single cat. I want spintech mufflers. The problem is, I want spintech 9000 mufflers and I don't think the spintech mufflers they offer are the 9000's

Also, am I gonna have to run straight headers (longtubes) to the muffler shop to have a system welded together?