So far, in no particular order we have these:
Sig, many different models, but I would say the Sig P226 is a great 9mm Pistol, and they have many other great 9mm pistols.
CZ-75, many variations of this one too, but CZ does make some nice pistols, and we will call them CZ-75
Beretta 92 FS , many are in love with the M9, but the 92 FS is the improved version of the M9, with some changes.
Glock has to be mentioned, they have a few 9mm guns mentioned, and none of them are bad.
H&K VP9 has been mentioned here, and many other places, so I will have to take that as a winner.
Ruger SR9 made a few lists, if anyone one has one who can give some feedback on it, that will help keep it on the list.
The list is of guns perspective buyers can find in a gun store, or at the Gun genie, not guns that will be almost impossible to find.