I have used the vending machines (Glacier) in my area that advertise RO/DI with UV sterilization. The readout says when it was last serviced and it always seems to be recent, but who really knows?
No expert here, but I'd go with that option versus a well IMO. I don't know what the softener would bring to the table as far as good or bad...
I have a RO/DI now just waiting to get hooked up.