I'm kind of a traditionalist so if I was forced to go with a 9mm I'd probably opt for a Browning Hi-Power, CZ75BD or a Beretta M92/M9 or Or a Taurus PT92.
Having said that, unless you have a compelling reason for a 9mm, I'd really reconsider looking at upgrading to .38 Super, .357 Sig, .40 S&W, 10mm, or of course .45ACP if this is to be used for personal defense.