I really appreciate the various advice. We stopped by Tourneau on 57th St in NYC just to take a look, and MIL was amazed that there were so many different brands (fiancee was just amazed that Gucci isn't one of the top brands). Even though we didn't decide on a watch yet, I'm leaning towards Mark XVI. Just not sure if I can get it to the $3K point.
I did take them out to dinner afterward as a small token of my appreciation.