Good plan. Nothing wrong with getting a new toy for your "new girl." Sometimes they appreciate presents ;-)
We use our depth
guage a bit but mostly because we are in a channel and when we are beating want to tack at the 2 meter mark - just kidding.
Our happiest piece of kit is the Otto. He drives our boat for us most of the time while we kick back and shoot the breeze.
For those that don't have one and at under a grand I highly recommend an autohelm
1000 for tiller boats under 30 feet.