EMP.. but,
...
I bought the SA EMP 9mm for the wife, and me, and it has shot 1200 flawless rounds to-date, along with either 115gr JHP, for her, or 124gr, for me..
Just keep'em clean, well oiled/WET and mags clean, and you're good to go..
One thought, and I would think, knowing how the EMP shoots, recoil wise, with 9mm, very smooth, very forgiving in follow-up shots, along with one-hand shots, good hand, or weak hand, and having a Colt Defender 3" 45, and knowing the recoil difference between the 2, I would suggest going 9mm over 40cal, as I have full size 40cal, and I know of all 3 calibers, 40 offers the least amount of forgiveness in recoil, especially IMO, in a 3" gun.
So, take all things into consideration, 9mm offers SD/HD JHP's that will do the job, along with allowing you the ability for fast, follow-up shots, if necessary.
Also, the 9mm will allow you one-handed shots, either with the good hand, or the weak hand, without jamming, as opposed to the 40 caliber, which has the most recoil, between 3 calibers mentioned above, and will be the least forgiving in all areas mentioned, as well IMO, in any 3" gun.
Good luck,
Ls
Colt Defender 45 and SA EMP 9mm