The tempest is a ridiculously big "mid" tower. It has more than enough room for almost any configuration, and most are very happy with it. Personally, I am not a big fan of the 900's looks, and I've heard it gathers dust pretty quickly. That 1200 is on sell for only $120, and is better than almost any other case as far as bang for the buck today. I still am going with the NZXT 921 for looks and size, as well as low price today. If I needed slightly bigger, I'd definitely have gone with the 1200 though. Personally, if you were planning to spend $110 on that case, then $120 for the 1200 is definitely worth the $10 extra, as it is easily one of the most popular full towers. I'd pick that baby up ASAP, since the sale ends at 3am.