The 10MM is a very good cartridge; however, its utility as a self defense selection is bested by other cartridges that are more conducive to such application. Firstly, sometime ago the "FBI LE Bulletin" published research findings that revealed the .40 caliber to be at its best for self defense use with 180 grain bullets combined with a muzzle velocity of around 980 FPS. Ergo, the introduction of the more efficient .40 S&W. In accordance with this principle, many 10MM offerings are now loaded to a greatly reduced velocity. Secondly, while this may foment the debate a tinge, the .45 ACP has been proven to be a better self defense cartridge than the .40 S&W and 10MM. With that written, a few years ago I talked to a cop who used a S&W in 10MM caliber in self defense, and he said the results were very positive.
At the risk of taking heat, the 9MM with any projectile is not even remotely in the same category as the .45 ACP. In fact, and most assuredly due to its pisspoor results, the 9MM is all but buried as a LE option. It seems like once a week I hear of another So Cal department going to either the .40 S&W or the .45 ACP, with the popularity nod going to the latter.
Running for cover,
Elvis