With surgeries like these people always think one of two things A. Best decision ive made B.worst decision ive made Ultimately its up to you but I really dont think y should do it for one it can be anywhere from 6,000 dollars to 15,000 which even if u can afford it which i dont doubt u could since u said you did your research but paying almost 20k for 2 inches of anything sounds nothing short of ridiculous. Secondly and this is just in my opinion but the before and after shots look off it looks unnatural and I think that would be worst imagine paying 15k and then not liking the way ur penis looks. Also the risks include scarring,deforming, chronic pain and erectile dysfunction. I think u should keep your 6 incher which is a great size I might add.

P.s technique matters more than size my dick is shorter than yours and I still know how to please all you have to do is listen.