We switched from LS to a John Deere at work in the 90-110 horsepower range.
The LS had significant issues with the front axle not holding up to the use that we put it through (mostly pushing snow with a push box that was lighter than the loader lift rating), shifting in the transmission, dashboard that went bad, wiring harness that went bad and general fit-and-finish issues. It was traded in at about four and a half years old on a slightly larger John Deere.
The John Deere so far has had a problem with a wiring harness on the loader that was misspinned at the factory (one of the wires ended up on the wrong pin where the loader wiring harness plugged into the tractor harness), but otherwise (from what I've been told) no significant issues with it.
Some of the issues with the LS (or at least the length of time that it was down when it broke) may have been attributable to the dealership being sold and their good mechanics leaving, but most of them seemed to be attributable to build quality.
From what I understand, a lot of the local farms run the smaller utility, compact and subcompact LS machines (say 60HP and less) with no problem.
The local Kioti dealer is supposed to be really good, rumor has it that they ended up with many of the good mechanics who left the LS dealer.
We have several Kubotas and have had no complaints about them.
Aaron Z