Some of my favorite reps are Cartier. I think Cartier watches are ideal for those of us with freakishly small and dainty wrists (mine is 6.5 inches).
I've got three Cartier reps purchased from different dealers. My absolute favorite is a manual winding Cartier Tortue with a black leather strap. Very simple, very elegant. Perfect dress watch. Looks like the Roadster, but without the magnification bubble. Got a Tank like drfcfighter's which I like a lot. Also got a medium size Santos Dumont-- looks just like the Santos 100, but much smaller. The Dumont is the only one I'm not completely happy with, and that's only because of the not-so-authentic-leather strap. If you get a Cartier with leather, you should really consider upgrading the strap. Only problem is that this can be harder to do than you would imagine, as Cartier watches use special bands with no holes designed for either double or single deployment clasps.
One word of caution-- be a little careful when it comes to pricing. Lots of our dealers carry the same watches from the same suppliers, but there can be HUGE differences in price. Personally, I wouldn't spend more than $100 on a Cartier rep. Not because I don't like them-- it's just that you can typically find them for around $50 to $85 (including shipping) if you look hard enough.