1800 calories for a 200 pound bb? Good Lord, that's way too low. Of course, it all depends on your activity level, but we're assuming you're lifting hard 4-5 times/wk and possibly doing cardio. A 200 lb man would lose weight on 1800 calories/day just lying in bed all day.
I'm 5'9, 180 lbs, 9-10% BF, and lose weight on 2500/day. AS for my activity level - I lift for 45 min about 5 times/wk and cardio about 180 min total/wk at 75%-85% mhr.
... just ranting I suppose.