We recently traded our '03 Kiwi 17A, ancestor to the X17A and X17Z. If we were looking at that size today, it would be tough choice. Our X20E has a small wardrobe closet. It only hold a few jackets and some misc. items on the bottom. We miss the big one that our Kiwi had. So the X17A would be appealing to us for that reason alone. On the other hand, our X20E has the J-Steel couch, and as Penguin said, very comfortable! And its nice to have that kind of comfort on rainy days or when we get up and aren't ready to go outside yet. So one vote for the X17Z. The X17Z also has two large windows, the A only has one. We choose our Kiwi over a Cub in part because it also had two large window that let in a lot of light. That may not seem important because you can open the flaps on the bed, but on a rainy or chilly day it can make the trailer feel more "open".
2013 Jayco Jayfeather X20 E, 2008 GMC Sierra 1500 Crew Cab Z71 SLE