You WILL get sick of Flowmasters. I had them for a while with my off road xpipe. It was cool at first but the excessive noise started to bother me. You get tired of hearing them ALL THE TIME. It was exhausting... no pun intended.
Now running
Borla Stingers with the same xpipe. Also added mid length headers to mellow out the sound a bit. Love my setup now. Sounds a little more on the exotic end of the spectrum than the muscle car. If I popped an H pipe in there it would sound like a muscle car.
I have no experience with Mac.