I'm on the Atkins diet for the foreseeable future, which somewhat constrains what I can eat. (No hate mail, please, from militant vegetarians or self-appointed health patrollers, and apologies in advance to any innocents who might inadvertently take offense.)
Try not to laugh, but I've been very pleasantly surprised by the Water Street branch of Yip's, a downtain mini-chain of Chinese fast-food places. I can't vouch for the cold buffet or most of the hot dishes because I haven't sampled them, but excellent roast chicken, spare ribs, and Chinese broccoli make for a perfectly delicious, dietetic meal that can't be beat at about four bucks per pound. The checkout folks are friendly and efficient to boot.