People are easily bored, and the culture encourages rapid change/replacement. Fuck that kind of thinking. Get whatever 9mm you like and shoot it until you're competent. Then push yourself to be an expert shooter with it.
A friend of mine changes carry guns every 1-2 years depending on what's the new hotness or his whim. He rarely goes to the range, has never been to training, and can't shoot any of them worth a damn. Don't be that guy.