Do this ^Welcome aboard from another new member.
Is there something about your XD that you don't like? Try cycling it a couple hundred times, preferably with live ammo. For me (and just about everyone else) the trigger is a low point. I'd also like a set of night sights. I'm not much into decorating my guns, but I've seen some pretty cool custom finishes on XDs that have my attention.
I wouldn't attempt to "fix" anything that's not broken or otherwise unacceptable. Usually one of my first moves with a new gun is to replace ALL the roll pins with appropriate solid pins. I also like to replace hammers and grips, but none of those things are issues on an XDm. Instead of throwing parts at it right out of the box spend yer dough on ammo and range time. Live fire and familiarity with the piece are are worth a lot more than any racy accessories imo. Sorry, that's probably not the answer you were looking for, but that's my $.02.
Again, welcome aboard! Lots of good info to be found here. :lol: