You are mostly correct. However, Honda, in their infinite wisdom, actually used two different sized front speakers. I have included a page from their parts catalog showing the two sizes. (The BLUE arrow points to the smaller speaker holder. The RED arrow points to the larger speaker holder) The smaller speaker size is not available, but the larger one is. The difficulty is that you won't know which speaker holder you have until you open it up. I suspect that the larger speaker is part of the comfort upgrade package.J&M is my choice. Manufactured to fit the Goldwing. Drop in fit and "Plug & Play".
No modifications and fitting to be done.
I put a set into one of my Goldwings, and it was a good improvement.