I run blade tech holsters and kytex mag carriers
http://www.kytexgear.com
But don't get caught up with gear! Get out and watch a match without participating if you want to get a feel for it ahead of time.
Have fun, make friends and be safe!
Lol, this. I just used the factory holster and mag carrier that came with my xdm. And I saw more than one other shooter just throw the extra mags in their jacket pocket.