I feel the same about the Fractal Design D5 ~ amazing dust filtering, plenty of space for rads, sound dampening material, all in a mid-tower, and at a $150 price point.Definitely the CaseLabs Bullet BH2. Large enough to fit a big video card and a 240 rad, but still very compact. Not to mention the very sturdy construction, love it.
My Antec Super-Lanboy is a close second, but just too small of a case overall after using something like the 800D. The Super-Lanboy was a great case for me at the time though as back then I was going to a LAN party pretty much every single weekend and it really was a great case for that purpose.
Jesus. That is so ghetto and cool at the same time.
I loved my Air 540 but wanted tempered glass, I waited and waited for a refresh of it with glass and even though they made the 240, I don't know if it's coming so I ended up getting the LianLi PC-011 Dynamic. By far my favorite case of all of them I've owned. Probably about 10-15 cases in the last 20+ ish years, I change cases a lot... but this one is sticking around.