Thought I'd just move this chat out of the shoutbox as there is likely more to be had
I'm looking for a case (ideally micro ATX) that is strong and can be taken on a flight as cabin luggage. At a minimum the case should be able to accommodate a full length double width gpu like a GTX 780. I'd love to have another slot ot two free which is why I'd prefer mATX.
I think quite a few people have similar needs so gathering recommendations should be useful.
the Fractal Design Node 304 has been suggested http://www.fractal-design.com/home/product/cases/node-series/node-304-black as being tough, functional and small enough for cabin luggage (250 x 210 x 374 mm)
The Bitfenix Prodigy M appeals to me as it can take mATX boards, and has tough handles on bottom and top which will make it easy to carry and protect it. At (250 x 404 x 359mm) it is not far off double the size of the 304 though and possibly a little too big for carry on http://www.bitfenix.com/global/en/products/chassis/prodigy-m#specs