I tried Toro dingo 525, Ditchwitch sk 650, and Vermeers S 800tx all on site in the same day. IMO the Vermeers ground speed was slow much like the dingo which was orignal design as a walk behind. However the Vermeer had the highest hinge pin height for bucket @ 84" load trucks the DW was around 80" and Dingo was far short of those heights. Vermeer also had lifting cap over other models, was all so the heaviest. The Vermeer had the worse ground pressure, the dingo had the best and most friendly to turf tracks. I feel that the DW had some issues drive motors hanging down below belly of machine, also the hydrulic detent was only lockable in one direction.The new DW sk755 has taken care of those problems, increased dump height,cap and some other things to make a better machine.With all that being said you should buy the Dingo 525 if most of your work is on turf this machine is far superior. The DW sk650 was good, and the fastest machine hands down, the new DW sk 755 with issues resolved from the 650 model is sure to be a winner. The faults or dislike with the Vermeer S800tx like rider present on platform and some other safety feature, which are good, but counter productive and the slow ground speed.
Dingo 525= Turf Ditchwitch SK 755 = allround
Currently have tired 2002 Dingo 425 with over 2300hrs, one of the best pieces of equipment we have ever purchsed.