I have been using the SOTABeams Bandspringer end-fed random wire and the 10m telescopic pole. The kx2 does fine tuning it without an unun. The kx2 can be a little picky on placement of the counterpoise on 20m, but it is not all hard to get to or below 2:1 across the band. I have on the to-do list to make a 64:1 unun and make a set of half wave end-fed wires to try, but I am not there yet.
I have built a linked dipole and like the performance at home. What I have realized is that, here in the southeast United States, the summits are not favorable for setting up a dipole mostly because of trees and other obstructions. My last summit, I could barely get the Bandskipper up vertically through the trees and shrubs. A dipole would have been utterly impossible.