Check out the Lian Li / Lancool Dragon Lord series. The cases come in a variety of configurations with and without windows on the side panel:http://www.lancoolpc.com/en/microsite/01/
I have one for my personal pc. Ventilation, airflow, and cooling are excellent. Plenty of room for video cards up to 11 inches long. Excellent cable management. Filters for all intake fans. Technical reviews were very favorable.
Here's a link to a video review done by monstermawd:http://www.youtube.com/watch?v=U2MdUGxWEcU
The lowest prices are at mwave.com if you are in the USA:http://www.mwave.com/mwave/deepsearch_v3.asp?scriteria=lancool&ALL=y&TP=