As all have stated, the satisfaction rate for implants is 92%. That is a really good number, but that means that 8% are not satisfied; and it is understandable that you want to hedge your bets to be sure you are not in that sorry 8% unhappy group.
You are working through the risk/benefit analysis of getting the implant. Some of us are more haphazard when it comes to considering risks, others are careful and calculating -- you are clearly careful and calculating, and that is ok.
All this hesitation suggests that you are not ready to face the risk and the pain. I remember a statement from a bionic brother here on franktalk who said:
QUOTE FROM LMCatman:
"It all depends on 'how bad do you really want it ?""
In other words, how many hurdles and risks are you willing to face to keep having sex ability.
There was also another person who I had a phone conversation with once I signed up for my surgery (a patient with an implant). That patient said: "i decided that i was not going to 'go out like this'" which meant he did not accept the idea of moving through life into old age without the capability to have sex.
I was really desperate to restore my ability to have sex. Had to have it. As LMCatman implied, I wanted "it really really bad". And since my natural erection capability was rather worthless, I opted for the scary nuclear option of surgery.
When you become desperate enough, the risks will appear justified to you. If you still have second thoughts, then it is time to still think and wait