I worked at Davis Tent for a little over a decade total.
I would not get a frame, ever, I'd get their traditional poles because they are significantly stronger, significantly better in weather, lighter, and shorter.
I would not get taller walls, ever, because they increase the wind profile and 99% of people put cots and other things around the perimeter. When someone is standing on the side of their cot, 3' from the wall, they have full standing height.
If you call in, the only person you should talk to is Chris.