Since you mentioned Just's SuperSTOL, also look at Rans Aircraft S7S. As is the case with the Just, not a heavy hauler. But the kit is top notch and the support is good also. Rans has been at it a long time and are continually innovating. We've built 2 of their kits.
No direct experience with the cub clones other than hearsay. I have dealt with Cubcrafters on a couple of different deals over the years unrelated to kit planes. They are very professional.