I just did a quick glance at my father's favorite jeweler's website, Kings1912.com (they have two stores: Nashville, TN and Miami Beach). Adler's in Nola has a SERIOUS watch selection too.
Any of the Hublot rose gold men's watches are TDF, and would definitely be unique I'm sure! The Chopard L.U.C Chrono looks like a great unisex watch, as does the Hermes Clipper Chrono (I'm totally biased towards chronographs... I loooove them).
Under women's, I was drooling over the Hublot Big Bang Orange Carat watch as well.
Since you already have a classic, the Cartier Tank, it might be fun to switch it up with a collector's piece!