Sounds good. Have you looked into the Herbie or Beananimal overflow systems? They operate on a full siphon so it is essentially silent. From what I understand if you set it up correctly, it will be much quieter than a standard Durso standpipe. The issue with the dursos is that you will still have noise from water crashing into your sump. Even if you submerge the drain lines in the sump, you won't hear water crashing, but what you will hear is gurgling/bubbling. The full siphon eliminates this issue.
