I suppose I am suggesting that the XDm is much like a Toyota Camry: a wonderful family car that will run forever. But it is NOT a car that should be lowered, or given nitrous acceleration...it just isn't a good modification car.
XDm's are awesome as they are. If you want to give it night sights, fine. Titanium guide rod, maybe. Stainless pins, even. But that's about it!
Thats pretty much what you do is change pins guide rod barrel work sights grip and what not and i love mine with all the goodies