Infact the first goal of my my question was to choose the Bose SS option or not. (about $400).
I'll do the install myself.
Maybe the speakers are really better than the stock ones, and it could make me spare some $.
But if the upgrading is more expensive than a new install, for the same sound quality, I prefer not to take the Bose SS.
The Bose has an stock amp & sub, that's the point. But are they really good enough?