If people would throw the misconception of "Over Penetration" totally out the window, I doubt very much that anyone would argue using the 147 grain 9mm. Maybe 10 years ago, but with today's ammo, the 147 grain will expand quite nicely. And because "Over Penetration" is "OVER RATED", there is no reason not to use the heaviest and most penetrating ammo you can get. Assuming of course that it works properly in your firearm.
FWIW: This same argument has been going on for years with the 357 magnum. Oh No.... Don't EVER shoot a 158 grain bullet for self defense. It will over penetrate. Bull Shiite. Crank that 158 grain Hornady XTP, Federal Hydra-Shok, Gold Dot, or whatever, and put 4-5 in their chest. And don't worry about the "Over Penetration". Your odds are greater that you'll miss your target all together than over penetrating. And missing your target is a lot more dangerous for innocent bystanders than an over penetrated round. The ONLY reason manufacturers came out with SMALLER Weight bullets, is because larger bullets weren't going fast enough to expand properly. And instead of stressing the gun by cranking up the speed into a 9mm Magnum or a 45acp Magnum, they came out with the 115-124 grain 9mm and the 165 and 185 grain 230. (As well as the 125 grain 357 magnum). But modern technologies has allowed that 230 grain 45acp or 147 grain 9mm to expand at their rated speeds.
Years ago, I always shot 125 grain in my 357 mag revolver. I shot 124 grain in my 9mm. And I shot 185 grains in my 45acp. These were my defensive rounds. Now, between Remington, Federal, Buffalo-Bore, and many others, it's back to the 158 for the 357 mag, 147 for the 9mm, and 230 grain for the 45acp. As posted earlier, I do shoot some 115 grains in my 9mm, but that's Hornady Critical Defense ammo and it's only for specific guns. My very small 9mm and 380 pistols. I will take the heavier bullet and more penetration any day of the week. Especially if you take out the "Over Penetration" unlikelihood that many people believe is going to kill someone. Extremely unlikely.