Claudio,
Here's the key = never ever give up and always seek the better change.
If this is your first site you've done a terrific job. But just because you've may done a 'terrific job' doesn't mean it's the "best job" you can do... it was just the best you can do at that time.
A little phrase I like to remember is this: there are no secrets, only people selling them.
Give that some thought.
Paul