Get one that'll show off your hips and butt by having a little more "poof" on the bottom. Unless you want it to look slimming. If you want that instead, get a tight dress that fits your shape. Also, I would suggest bold colors because it'll match with your skin better (just don't wear black because you will look like a ghost). And don't be afraid to show off your legs-that's what guys like best about most girls!
It sounds like you could wear most any silhouette with your figure. Since you are taller, some dresses might be too short on you, so a high-low hemline can help eliminate that problem. Like this style: <a href="http://www.tjformal.com/p7820523/la-femme-dress-19634.html#subtitle" rel="nofollow">http://www.tjformal.com/p7820523/la-femm...</a>