Johnathon Doe,
Welcome to the forum and the world of PE.
It is your body, so do what you want to with it. Shoot for the moon on your goals. But I recommend being careful on what you ask for. Too much of a good thing is normally a bad thing. Let me explain?
I don’t know your age or anything because you didn’t fill out very much on your statistical information in your profile. Based on your statement above, at 9x6 you are already bigger than 99.99% of men. With something that big it will be difficult to find women that can take all of it in any orifices they have. I am sure there are some who can, but you won’t find many. So you may have trouble finding woman that can take it all. It may even be more difficult to find ones who can take it all AND get pleasure out of it for themselves. If they are not getting pleasure out of it, they may not be around long. So in the end, how much pussy will you get with a 10x7 dick? I don’t think it will be much?
What do I know, not much when it comes to a big dick. I am on the small side so take this for what it is worth. At 6x4.5 inches it is below average and has been my entire 47 year old life. That is why I am here. Anyway, even with a less than average size dick I have had a couple of women tell me I hurt them. Not bad, but a little. So I adjusted what I was doing and went back at it. We both had fun. I have had no one complain on my small size, at least to me. They may have to their girl friends, but who cares. Almost all of them came back for more, and more, and more. So why did I say all that.
I like having fun with my dick. For me the idea is to have something that pleases you AND your partner(s). If it is too big and hurts, I don’t think you will get to use it much. If you don’t use it much, you don’t have much fun with it. That is not my goal at all. If you cannot have fun with it what is the point, at least the way I view the sexual world.
So my recommendation would be to do PE for improved erection quality, but I don’t think I would have a goal of getting bigger.
Take care and I hope you reach your goals.