Milos-stancene :
one 120mm fan at the top is not enough to blow that air out .....
I got to say that i feel there are quite a bit of myths and misconceptions about airflow; for one that more fans are better and that negative is some how better then positive. Believe me i was all for negative a few months ago but after some serious research i found that positive not only improved system performance but also cleanliness and thus, component longevity. (when filters are used on every intake fan like all of Silverstone's products)
now, i refuse to buy any case that is not positive airflow or that will not offer the ability to create positive airflow (properly with a lot of filters), and there are few companies out there who use positive airflow builds because many would rather capitalizes on popular misconception and lack of knowledge/research available.
I admit, the HAF is much better looking, but i would go with the any of the Silverstone products because it means lower temps and a cleaner pc.
some proof? well my favorite to show is this link:
http://www.silverstonetek.com/tech/wh_positive.php?area=
its simple to understand and has pretty good flash animation rather then just pure text.