shake shack!!! it's the way to go. it's so good. but if you wanna browse around a bit, check out this great website i found with video interviews/reviews of places to eat, things to do, and sites to see in nyc. it's called uloveny.com. Here's the video reviews for shake shack
http://uloveny.com/nyc/venue/2/416/6999/shake_shack but you can also type in burgers in the search field and find a ton of other great options. have fun!