Well juris I think aluminum wheels would be a good choice, as I have to remove my hubcaps to accurately check air pressure not really that time consuming however.
I would opt for a thermostatically controlled fantastic fan for the cooler nights, I haven't checked that out yet.
I like your idea of using your own entertainment gps radio as the one that comes with it really doesn't have great sound, as a matter of fact when my warranty is up I will take it to a radio shop and see if they can add something for the sound have had Bose in most of my vehicles.
Solar would be nice however I stayed in Iowa for 9 days this summer using the minimum amount of batteries, pump,fantastic fan,tv,water pump,lights,and had batteries to spare.
Hope this helps a little, overall this coach works great for us.