I tried for a several years to find a good 4000 SU (preferably) diesel with either S-O-S (I like them) or 4X2 transmission before giving up and buying a new MF 533 (the 2007, 201 CI Perkins modernized version of the 135). I wanted the LP SU version of the 4000 for mowing duties on steep ground but simply could not find a decent one.
Subsequently, I bought a second, new 60 PTO HP MF because I wanted to keep my local CNH dealer honest.
Ultimately, both MFs turned out to be mistakes and I sold both at losses, replacing both with Kubotas. Since then, I have bought three more Kubotas and there is no going back.