I can't personally comment on the rear muffler delete but from what I've read from some peoples experiences it causes significant drone at certain constant speeds which might not be appealing to some.
I've gone down the route of deleting the second cat and resonator from the midpipe and that has given mu N Line a pretty decent sound without any drone or being too loud. I had this done at an exhaust shop because it was before Cherry had the option of the race pipe which I think is about $175.00
This mod won't throw any codes because all the sensors are before this section of the exhaust. I've done over 10k since the delete with no issues.
If you listen to this video from 0:35-0:45 this is exactly what my N Line sounds like
YouTubeHope this helps