Hydra's have been the standby for a long time. However...that said they are old technology. They are decent bullets.....but I would not bet my life on them.
To me....the Winchester Silver Tip Personal Defense rounds are the top of the barrel. I also like the Corbon bullets. There is a company called Double Tap...and they make fine ammo as well.
Dont let the caliber junkies worry you about the 9. I can vouch for the pain it causes personally.