To just to comment on the pricing as well. There is no doubt that as a whole, this system is expensive. But breaking down the pricing and looking at the value of your dollar spent, there is nothing as "bang for your buck" compared to Evolve's E-Tronic Exhaust.
I've mentioned this before, but take the most commonly purchased muffler for the E90 M3 from a very well known company. Their muffler is around $2840, then an additional $585 for connecting pipes. In total, it ends up being $3425. That's a whopping $75 cheaper than Evolve's E-Tronic Muffler.
I'm not sure where Evolve sources their cats from, but I got quotes for HJS 200cpsi cats recently and it was more than half the price of Evolve's XPipe. Add in the cost of resonators, piping, and production costs.
In the end...I want one of these systems, haha.