Thank you and I will be testing whether or not it holds water fine tonight. The seams are really clean so I'm not expecting to have any issues.
As far as the lip is concerned, I didn't put it there for structural reasons rather I put it there so I can tuck filter floss underneath it. This is how I have my current set up and it's been working well for me.
When I create the tray for the filter floss and place it underneath you'll get a better idea as to why I did it.
As far as the noise is concerned, Matt is correct, the sump is located in the garage and will not be an issue at all.