I know this topic has been discussed to death... but... I just purchased a ThinkTank Airport International v.2 AND a Storm Case im2720.
So I can fit the following in the ThinkTank (pretty much everything for a macro setup):
Nauticam D90 Housing
2x Inon Z240
Port/Gears for Nikon 105mm
Chargers/misc. cables
Arms/claps
Fisheye FIX focus light
Nikon 105mm lens
Tokina 10-17 lens
In the Storm I can fit all the above PLUS and extra room to grow:
8.5 dome port
and extra space for camera/lenses (wouldnt keep them in there when traveling, but storage at home)
95% of my travel is to SE Asia (and I have status on airlines so extra baggage is fortunately not an issue).
Since I check all my other dive gear of course, would you just check the heavy duty Storm or put the dome with the dive gear and roll the ThinkTank on hoping that they let it in carry-on (its appropriate size, but for sure overweight!).
Cheers,
Chris