I'm in the process of figuring out something for my lx470. I'm thinking drawers in the cargo space with a folding (or separate) part that will lay on the seat backs when they're folded over and a hinged part on that section to access the floor area of the back seats (behind front seats) for...
There are good deals on the Thule M.O.A.B. right now. Just took advantage of REI's recent 30% off sale and with my dividend it came out to 250.
The bajarack mule looks pretty awesome, too.
I have an LX470, my wife has a runner, and my parents have a GX.
we looked at the trail edition runner and it's pretty sweet. I like the body cladding and wheels a lot but hated the sliding cargo tray they all seem to come with. My thoughts were that unless you're REALLY gonna use the crawl...