Ordering my new Arctic Fox..option questions

Be sure it has exterior lights on both sides, preferably LED. In the past they were only installing one on the drivers side. I had an 1140 with no light on the passenger side...not so good. When I ordered my 1150 it was on the list. Your build sounds right on. Your list is pretty spot on. If you don't need air, so be it. It will come pre-wired regardless. You will love dual pane windows but remember this; The door will be single pane. Check out my do it yourself dual pane door window modification. It is a sticky in the truck camper university under projects - exterior. You will find it at the top of the page when you open up Truck Campers. It will be worth you time. Its a lot of money to spend on windows but still feel the cold coming in from the door. The Onan generators really are not very good, very loud and create a lot of vibration. Your better off with a detached Honda or the like. You can get a LPG carb modification for them if you don't want to carry gas. I would highly recommend this modification. Slide toppers are a must in my book also. DO NOT GET OUTSIDE SPEAKERS! They will eventually leak and cause all kinds of damage. Ask for LED running lights if they aren't already using them. If they don't maybe you can work out a custom deal. The holes they would drill for the wiring is much smaller and I would also suggest flush mounted brake and turn signal lights. They used to have huge cutouts for their rear lights which leak eventually...been there done that. If it has a book shelf above the bed you may want to eliminate that too. I liked that we eliminated it in our 1150, just a thought. Get the carpet kit option you will be happy you did. One big one in my book....NO GRAPHICS! Look at my profile...it's a white elephant. They peel, they fade and try pressure washing without them comeing off, just another suggestion. Way less maintenance and sun fading.
Good luck with your build!