I love the Saw series, but I think that, like everything, it has its limits. Eight movies would be the limit, in my opinion. Especially since, by then, they should have covered everything they possibly could by then (including a 3-D movie!) But as long as they keep being good and successful, I see no reason why they shouldn't stop. But that's 2 whole years away so let's get through Saw VI first, shall we?