Exhausts and bumper delete kit for Ford GT - any advice?

[Namor]

I'm in the process of importing a new Ford GT from US. Does anyone have any advice on which aftermarket exhaust to go for ie Ford Racing, Accufab or Heffner? How do they differ? Would also like to combine this with a bumper delete kit. Looks like "Cooltech" in CA do a nice kit. Anyone got experience of fitting this with an aftermarket exhaust?

thanks