Just so you know, everyone wants the following in their sleeping bag:
Warm
Light
Cheap

Unfortunately, there's no way you can get all three!

The sleeping bag should be a couple of inches longer than you are to allow foot wiggle room. Also important, check the girth of the sleeping bag (at shoulders, hips and feet) against your own girth at those points, while wearing your insulating clothing. You want to be able to wear extra clothing inside the bag (to extend its temperature rating) without compressing the insulation.