Whoa, thanks for all the great responses. I'm glad I sought the forum's expertise on the versatility of the navy monk, although my wallet won't be tomorrow! I've got a good selection of staples (black, walnuts, dark brown, and burgundy), so I think a navy double monk will be a good addition.
NAMOR - Your tumblr basically sealed the deal. The navy shell looks outstanding with each of those combos.