Im waiting to buy a 570 (I will one day, its not a question in my mind) until I understand how to get the modifications and use cases right the first time. The aftermarket for the 100 series is massively widespread and relatively inexpensive. This gives me a few years to try all the things out with the family (camping, 4-wheeling, trailering overlanding, road trips, etc) and figure out what I need, what they'll tolerate, and what is worth how much to me.
THEN I can spend the money confidently on the 570 (where it costs a lot more to do various things, if they can even be done) knowing that I'll get my use out of it.
Point in case: I am attempting to build the 100 for overlanding through central america. Long dirt roads with massive potholes mean that everything rattles itself to death, chokes on dust, and suffers in the heat. It is costing me a few thousand to build up the 100 to do it. It would cost me a lot more to build a 570 (especially in depreciation due to such thorough use).
It may turn out that my career or my family or my (whatever) may keep me from ever spending a lot of time south of the border. Net risk, 100-series: 10-15k 200-series:30-40k$
Just a thought and my 2 cents.