My father in law was an electrician. Told me once you can never have too many outlets.... I listened.
I put in R13 in the walls and R19 in the ceiling ....at the suggestion of the installer. Rolled fiberglass...Knauf brand if that means anything. He suggested I do a drop ceiling to avoid any condensation issues so that what we did. He also sealed all the doors, windows and the outlets. I thought $1500 was a fair price for the job he did.
I am going to insulate the door... They make a kit for that purpose. I was going to install an insulated door but that got lost in the mix and I didn't feel like trying to fix it at the time. I hope I don't regret that decision.