My thought at this point is really "just go with something that a sufficient number of LE agencies have authorized and make sure it runs in your gun". Not because I'm a wannabe cop or anything like that, but just because if enough people are using it then I feel more comfortable, and LE have an interest in making sure they use good ammo (and LE are people, too

). I figure more ammo has been run through Glocks by cops than I'd ever be able to personally shoot in my lifetime.
That's pretty much why I want 124 grain +P gold dots - because when I went google searching what LE agencies authorize in 9mm it kept coming up. I think back when I bought the Hydra-Shok, Hydra-Shok kept coming up, although I don't remember if I chose on the basis of weight or if it was just 'the store I went to had some 147 grain hydra-shok on the shelf'.
The reason I want *new* ammo is because what I have, I've had for a while. I had some FMJ that was the same age and it all went bang when I took it to the range a couple of weeks ago, so I figure the JHP I have will still go bang, too, but newer ammo can't hurt.
So, I basically agree with the 'too much time and energy' comment. On the other hand, I like that there are people doing that, because it benefits the rest of us (both by advancement in ammo design, etc, and not having to test everything individually).