Coach. Welcome to the forum and congratulations on ordering the R9 Stealth and from Tom. I use Winchester Silvertips 115 gn. only, because of no problems. I have 115 gn. Gold Dots, 147 gn. Golden Sabres, Hornady Critical Defense, and Winchester White Box 115 gn. hollow points as backup ammo. All of these are recommended by forum members.
On the holster, I have a Meco front pocket holster, black with full stitching, just personal preferance on color and stitching. I also just got a Meco back pocket holster, lined, and I intend to use this as a front pocket holster as well. Works very good.; looks more like a wallet to me.
The ammo is whatever works best in your R9; some like a certain diet. I tried Silvertips first with no dificulties and have plenty on hand, so just sticking with that as long as I can find them.