rayonline: I used a old case. I don't need a window side panel and blinking lights. Cleaning the dust takes the longest part.
Cleaning the dust out is where an air compressor comes in handy, about a minute and you're done.
I'm not a big fan of side windows or lots of LEDs etc either (and I specifically ruled out cases that had those), the OCD in me just likes it all as tidy as possible. Off topic, but I only got the new case was because I needed more drive bays - the previous case was probably getting close to being 15 years old!