Depends on your work I suppose but for me the stand out on positive on the U17 after my 801 is the zero swing
never used a zero swing before and its brilliant not to have to watch the arse end when your up close.
Not sure whether i would go zero swing on my 3t,only ever had (for a brief time) one zero swing 3t and it was a 8027 zts JCB and it was the worst machine I have ever used , would even move if you were arm out cross undercarriage
........love the stabilty of the KX71-3 it makes it superb for grading compared to my 8t kubota with its tilt bucket that shows you up if you dont concentrate on being smooth.... just graded off a few hundred m2 of 0-30mm with it and its hard work to get a mint finish, hydraulically its brilliant but nodds as you come to grade which spoils it.
Took it for granted before but the kx71 makes you realise how much better a stable machine is compared to a noddy fecker.
No1 priority for next machine