Well said Nick, and great postings.
The price the customer will bear is a serious design driver, and can often be the source of frustration for the specialized operator to which you refer. They are forced to make do with something designed for the broadest customer base possible, or to modify their operation to suit the aircraft.
The "Budget priced, 160 Kt, fuel mizer, all weather, on-condition, full mission OEI, zero exposure Cat A, pull stumps out of the side of a hill at 12,000'" aircraft hasn't been worked out yet......unless you guys have one