IMO the regular pure strike 16X19 (3rd) has enough mass and high swingweight for excellent stability. It is not so much whippy compared to the 2nd gen project one.
If you really want a higher static weight as well as swingweight, go for the Tour, but I think the regular pure strike is already very stable and powerful. If I play 3 sets game, I will definitely choose the regular pure strike over the tour.