I just got an Aspire X-Dreamer II from NewEgg. It has a removable mobo tray, which for some reason isn't advertised. Think it might be because the earlier revisions (most obvious difference is 2x80mm rear instead of 1x120mm) didn't have them. The black one with window goes on one-day sale every 7-10 days, save a few bucks on the case, $10 on shipping. I got mine for $61 shipped, it was $59 shipped on Thursday. It's steel, but quite light due to thinner sheet metal. No internal sharp edges, but you might dent one of the side panels pretty easily. Lots of reviews online.