"I want one" is reason enough. Even if it's really because you watch too much TV. snicker. How well does it fit your hand? Thats the first consideration. Changing grips won't change the size of the frame so try one on for size before you buy.
The U.S. military bought 'em for political reasons, only. There were lots of slide failures early on, or rumours of slide failures, as I recall. However, they were adopted because other NATO countries were complaining about the balance of trade being heavily in favour of the U.S. Then, of course, the contract stipulated U.S. manufacture. Beretta gets a royalty, I think.