I think you should do whichever one you want to do. Everyone is going to have their own personal preference, and I don't think any will help you decide. It's a personal decision. You are going to have people say why get a peircing when you are already pretty. my personal preference would be the lip peircing. I don't imagine it would obstruct your dialect at all, obviously at first it will, but once it heals it won't. I have my tongue peirced, and I don't have any issues whatsoever with speaking. So good luck with your decision.