Exo has a 2200 coming out in June for the new K4. The additional 400 comes from a large top pocket so the foot print isn’t much bigger.

Have packed a few animals with the K3 1800 and it was pretty comfortable. Have been doing some hikes with the K4 and am liking it.

Have also used the Stone Glacier with the newer version and older version of the Approach quit a bit and really like it.

My kid tried the MR Pop up 28 and neither of us were to impressed, but others seem to like it.