I decided to go with Pelican cases since my cruiser runs without a top for over half the year and water and dust are real issues when wheeling without a top. I also like that I can pop them into my other rig, or a friends and know my gear is organized, dry and safe. I have been scouring craigslist for weeks and have landed some great deals on these cases, and with a little trading I have had very little money out of pocket. I have to land on a method for securing them down, but I think I am going to go with load-tracks and the ring tie downs. I might bolt a few tracks to the floor of the 40, and a few to the fender wells. From there I can strap or turnbuckle the cases down. Should be fun. I have two soft bags with fluids, recovery gear, and basic tools that ride in the truck 24/7. (barely visible behind the boxes) and I run a few soft dry bags for clothes and sleeping bags.
2 Pelican 1600's, one on each wheel well.
1 Pelican 1630 (large trunk for latern, tent, spares, bulkier items).
1 Pelican 1650 that serves as my chuck box with everything for the kitchen riding inside.