I want to get a Kreg pocket whole jig but I can't decide which one.

The K4 is cheaper and I can get it from Lowes for $89 with my Veteran's discount. But I think I would like the clamping mechanism better on the K5 which Lowes doesn't stock so the price will jump to the Amazon price of $129.

So I need your input. Which do you prefer/recommend and why?

Thanks.