If you're buying the camera from Amazon, just make sure it's coming from Amazon "proper" and not somebody else selling through Amazon. At that point, it's just a matter of price, shipping, etc.

The reason I and others really like B&H is that they're entirely predictable. If they say it's in stock, then it really and truly is, and it will ship quickly. I've been buying stuff from B&H for maybe 11 years and I've been consistently happy with their service.