The 9 is fine for selfdefense and will get the job done at SD distances if you do your job. Todays 9 mm HP ammo isn't what it was years ago and SD performance has improved 10 fold. I also don't feel the need for a .40 or +P 9mm. I feel 100% confident that my Shield 9 loaded with Federal Tactical 124gr HST will deter any threat to my person if I do my part with being to able to put bullets on target in a SD situation. No need for anything else. Of course this is all IMHO.

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44 Garrett Defender Ammo 4 me.