If it's my only pistol, then the Ruger SR9c, because it's also fun to shoot at the range. If not, then I'd also consider a Ruger LCR - very reliable, but not as comfortable to practice with. The former is my wife's favorite gun, and the latter is my current BUG.
The Bersa Thunder 380 is a good choice, but I'd try a Bersa in 9mm; still in your price range, and ammo is a lot easier to find and cheaper.