Gary,
I owned a popular pop-up brand for three years and currently have the hardside in my signature. What do you really want to know?? IMO, the main reason to get a pop-up is if you want a smaller exterior package to get into backcountry/offroad areas. I also liked the open airy feeling surrounded by windows at eye level.
I didn't notice/see what truck you have. Depending on what pop-up brand and model and ammenities you are interested in, you won't save much in weight compared to a hardside. If you want to save weight then a pop-up without a bathroom/shower/built-in toilet and the basics will work. Think Four Wheel Camper.
You really need to step inside as many truck campers as you can before you buy one. A Four Wheel Camper pop-up will feel completely different than an Outfitter or Hallmark pop-up. Same thing goes with hardside campers. I've stepped in several that i just hated the floorplan and others that I really like.