Guns are so subjective, its impossible to tell you which is "best." As everyone said, you need to go to a store/range that has several sizes/brands/styles that you can test out, and just try them out. One of them will just feel right. Thats the best advice I can give you.

By the way, do you know what size of a 9mm you want? Do you want something full size, something compact, something for concealed carry? If you let us know what size frame you're looking for, we can point you in the right direction for what to look at.