Welcome! Lots of info on exhausts here. I've heard the Borla is on the high end of the loudness scale for catbacks and has a bit of drone. I have the MBRP and love it. There is a pretty lengthy thread on the MBRP and everyone else seems to love it too. I'm not tryin g to sell them, I'm just a fan haha. But it all depends on what kind of volume and sound you're looking for.
You weren't asking me, but I'll comment. It's pretty easy. check the how-to/DIY section on this site. My tips are to not force it because it is easy to scratch your paint, and don't use too much heat because you can melt your clear coat. The ones on the wheels: the whole star shaped cover comes off, or you can get
overlays which are cheaper and look just as good. Just use heat to apply so the edged stay down