Winchester SXT in the 9mm, Remington Golden Saber in the .38 and Speer Gold Dot in the .357 Sig.
Good defense ammo is always a plus, but keep in mind many many people have been killed and or put down with ball ammo. If I couldn't find what I absolutely wanted, I'd honestly have no real issue with carrying some Wal-Mart hollowpoints.
Go ahead, flame me for it.
I think this point bears repetition and expansion.
There is no bright line dichotomy between "personal defense ammunition" and all other rounds. The variables in target composition and reaction, round performance, shot placement, and shooter skill and reaction are infinite. This means that in the universe of historical and possible situations, there are cases where plain old ball or lead solid will do the job superbly and cases were a half a magazine of the best "personal defense ammo" will leave the BG with just a change of facial expression.
If this is so -- and let there be no doubt that it is -- then the best "personal defense ammunition" is that round that both you and your gun are happy and familiar with and handle well.
For example, for a lot of years I carried a short-barreled K-frame .357. After a lot of experimentation, I concluded that full house .357 rounds (I carry only factory on the street) generate too much recoil and flash for a real life close quarters combat situation. I finally settled on a Remington load, a 95-gr. serrated jacketed hollow-point .38 Spl. +P load. Since recoil is a function of the first order of bullet velocity, while bullet energy is a function of velocity squared, this round yields a better energy:recoil ratio than any other. It was easy to control for multiple shots, and I developed a good deal of confidence with the round.
Now, if I were heading into the woods, concerned about predator animals, and told a .357 was all I could carry, it wouldn't be loaded with 95-gr. hollow-points. On the street, it would be.