If you want full towers then by all means, Obsidian 800, HAF X, ect. Those are for people who have more than 3 GPUs, a full custom water loop or two, several HDDs. You get the picture. More space doesn't mean better airflow either. If you fit the above category now or in the near future then go for a full tower. Otherwise I highly suggest against it because it's a lot of wasted space and metal for nothing.