I just received my 925 from the ShopHQ deal... Still keeping my 521 as the "stuntman" as well.
As much as I love the way the 925 looks (and the camera, and the screen, and the RAM, and the LTE, and the ...) I can't help but feel the 521 is a bit more solid. I'm yet to order a case for it, as I'm using an old leather side holster that the 925 fits into perfectly (a little too perfect, as the corners are exposed where the leather wraps around the ends) and I'm anxious about dings and scrapes. My 521 just slid right into my jeans pocket, ready for action.