It's a sad world we live in when we have to make this choice. LOL Signing a 0-0 fighter with no competitive athletic/martial arts background is by far more embarrassing, I think, though.
Unless Punk is some sort of true Rennaissance man, I imagine that it going to be a freak show. Kimbo/Shamrock is just a lower org type of thing to do. They are both legit, whatever Dana has to say about Kimbo but way past their primes and not anywhere close to the top of the sport.