TC Doors. Small Pop up doors vs Larger Hard side doors....

You should focus on what you want before deciding you need a bigger truck. Four Wheel Campers makes shells that could be carried on your current truck if desired.

I don't own a Popup, but there are lots of people who use them without a problem. I suggest going to a dealer fully dressed with coats etc and try going in/out a few times with your wife. That's probably going to give you the best answer.