I'm fortunate enough to own pretty much all the high end 9mms from around the world that were built over the last 50 years or so, with multiple copies of a lot of them. While you can spend many times the price, the best bang for the buck in terms of accuracy is the CZ Tactical Sport, in my experience.

If you're looking for an accurate 9mm, I wouldn't waste time looking at service pistols, especially polymer.