9MM Ammo Recommendation/Suggestions?

[Justice]

"...to compare performance..." That's exactly what you need to do. Every firearm prefers different ammo. So since you're not reloading yet, you need to try a box of as many brands and bullet weights as you can to find the ammo your pistol shoots best. Cycling is unlikely to be an issue, but that matters too.
Steel case ammo is usually low end milsurp(not all milsurp is low end though. IVI, if you can find any, is low end ammo for accuracy, but the cases and its reliability are not.) and at least some if not all steel is berdan primed. As in not reloadable even if steel was reloadable. It's not. It can be hard on extractors as well.
Al is not reloadable. Of course, there's brass cased Blazer as well as Al cased. No difference, if your pistol likes it.
Factory ammo gets expensive in a hurry too.