So, I'd disagree pretty strongly with whitman and thissideofparadise (and generally speaking, most feedback from a self-selected group of prospective students) on a couple of different points.
1) Vanderbilt is not a regional school. At all. Vanderbilt is a top-15 national program, and is generally recognized and respected as such. Yes, Owen has a different ranking (albeit one that is ascending rapidly, similar to Foster) than the parent brand, but outside of this forum and anyone who went to Wharton, nobody obsesses over rankings--they respect the overall institution. In Colorado, Owen is one of only a handful of programs from which DaVita pulls (HBS, Stanford, Duke, and Kellogg are most of the other names), and has a terrific network of people, though it's not as large. If you're looking at 2 programs under 200/class, you're not going to find huge networks in beta cities.
2) You'll have amazing scenery in Washington state. In Tennessee you have the Great Smoky Mountains (#1 visited national park in the US). With all due respect to Seattle, you won't find a hotter city right now than Nashville.
3) As a veteran, you'll be in good company at Owen. This could be a comfort, or you may want to be around more civilians, but the south has always been known as a welcoming home for those who have served.