I just posted a piece on my blog showing various configurations in my roller cases used for transporting my gear. Four cases are shown, three from Think Tank and a new one introduced by Manfrotto recently, specifically for lighting gear. If you think this might interest you, I invite you to visit www.foto-gizmo.blogspot.com
You mentioned what you use for your camera equipment cases when traveling, but what about transporting lighting equipment that you can't bring as carry-on luggage? Are the Think Tank and Manfrotto cases sufficient? I actually have some of these cases but have only used them for local assignments so far.