Love my XD .45.
I've owned 2 of the service models, one compact and 1 tactical- all in .45.
In 9mm, I currently own a tactical model and have had the sub compact too.
The .45 service model is my favorite of them all. I carry one daily and it's actually very comfortable in a Crossbreed Supertuck IWB holster.
I'm getting ready to order another custom XD from Springer Precision.
It'll be finished like this:

It'll be getting his combat/carry trigger work, extended mag release, Dawson Fiber Optic sights and more.
I'm also having him do the snakeskin grip finish, like this: