Remember back in the day when overclocking was something you did with low end chips to bring to the performance of high end ones and the high end ones didn't have much headroom because they fulfilled their potential at stock?
I think the 1700 will be delivering this, remember all three chips are 8/16 with same cache and features. The only difference is clock speeds and the 1700 has a much lower base clock to drop into the 65W TDP category. This is where my money would go and then work on clocking it upto 1700X-1800X levels.