Pelican makes great cases, I have several, but they are reserved for gear that has to be checked or might be checked at the last minute. If you are flying in small regional jets, island hoping, or traveling to obscure locations, this is a great case when they hand you the gate check ticket and take your bag from you. I recommend the 1510 in this situation above all others.
Put some unique marking or stickers on it though, as once in Paris, myself and two other photographers had to compare gear to determine who's case was who's. What a coincidence, three identical (and nearly brand new) cases on the same flight!
However, if you are not in this situation and weight is an issue (traveling overseas) I can also highly recommend the Airport Security bag from Think Tank photo.
Think Tank I have been using this bag since February and have found it is well designed and can take a bit of a beating.
I hope that helps!
Mike