HAF 912, not the prettiest case, more of a rough and touch look to it, some people really liek it though, lots of features and only like 50-65$ online.
I've heard a TON of good reviews about this case, but I'm not really into the look. I'm not really into the appearances of any of the midtower HAF series except for the HAF XM which is out of my price range. I do like a lot of their full-tower chassis, but again, out of my budget : /
take a look at (i think, cant remember if this is it or not) the NZXT 220. nice simple case. considering using it for a case design with reduculous airflow. (side panel all intake fans, front top and back all exhaust, interesting consept and needs a simple case) but it looks really nice.