I used to worship Cat and had no interest in the older Komatsu's. But now that I have been running the new Komatsu's.....nothing compares. For me anyway.
The hydrostatic drive on the smaller machines is really nice. And they are fast. But the one I really like is the WA500-6,7 and 8's.
They are so quiet in the cab the only way you can tell the engine is running is by looking at the gauges. The LED lighting package is awesome, they are smooth, lots of power. And I like having both the joystick steering and still having a steering wheel in there too.
And no regen or emission issues so far.