Which is the most stable 1500 1600 or 1700?

Which is the most stable 1500 1600 or 1700? ...Just saw that the site im buying em from stores a huge stock of 1600 compared to the other 2?

Stable in what way?

Just cause the one store has a large stock doesnt mean they like the product could mean that they cant sell them.

If you were to o/c all three in identical systems, the 1500+ and 1600+ would become less stable sooner than the 1700+ as you overclocked each to higher and higher identical speeds. And, as the o/c speeds are lowered, they'll each eventually become equally stable.