I just ordered the 3.8" XDM. I want to get a good IWB and a good OWB for it. I'm thinking of getting holsters for the 4.5" XDM so that when I get the 4.5" I'll be set for holsters for it as well. So, is there any reason to not go that route? I know Aliengear is one of the highly thought of holsters. What are the other ones I should be looking into? Thanks for any and all input.