I like buying my cases at Micro Center. Much to large of a chance of a huge case getting damaged during shipping, not to mention ridiculous shipping charges. Most of the negatives against newegg are because thier cases got damaged during shipping.
Another place you might want to look if you're looking for a good price is the Refurbished section of NewEgg. If you're not comfortable with the idea of refurbished parts, though, this probably isn't a good option.