Personally I like the Fractal case (link 2) because I don't like the look of the Cooler Master. Fractal cases are renowned for good air flow and quality design. However because I have never owned either I cannot comment any more.
Its all about personal preference. I am not saying the HAF is bad I would just rather have the Fractal instead as I wouldn't like the LED lit lights (I do a lot of background downloading over night).