My opinion remains in that you have to be careful regarding the warranty. Hypothetically, you may experience some "rattling" issues internally which can easily be attributed to the new exhaust vibrations. In this case some dealers may not want to spend the time locating these or fixing them if they believe it was due to a third party fitment.
My impression of the post I was referencing is that it was mainly about the money, I agree if it's about different sound and tastes get what you want.
Maybe I'm just too wary about the warranty aspect, anyway each to their own and I hope you enjoy whatever you get, the ISS system does sound good.
Donald
indeed that is a problem when owning a 100K+ car
always worried about warranty due to the cost
but iv been fine with my dealer
i fitted all my exhaust and mods on my self
everytime theres a rattling issue they just fix it