^^ i do the same, this thing is my baby. If I can drop this then I can't trust myself to hold a baby either. I've had it 2 weeks now NAKED (by choice, the phone is incredibly comfortable in my hand) and I love it. Haven't dropped it once but I did...
I'm considering switching from my Nexus 5 but I might wait this out. Another year better devices right?
If you did a search you'd find the answer pretty quick but I'll play along..
Download pretty much any ringtone maker app. I use "Mp3 music ringtone - droidring"
a small blip for a company that makes millions of profit every year, don't worry about it and enjoy it
have you tried airpush detector?