I have a comic signed by Jack Kirby and I'm looking to add Stan Lee.

I'm debating whether I should use Official Pix next month to get the Lee signature and then I could always get PSA or JSA in the future.

Or, do I wait for a CGC Signature Series opportunity? Obviously, CGC Signature Series is a first person witness service as opposed to a third party. But, does it really drive that much difference in terms of market value? 

Other items to consider...

* I'm a bit concerned about waiting too long for Stan Lee. While "The Man" appears to be in good health, he is 90-something years old. So the temptation to do the first available signing is strong.

* CGC Signature Series is expensive and can take many months to get the book back.

Thoughts?