Thanks to all who have weighed in on this thread. I'm in a similar position to the OP and have just recently started to look at what's out there to support a 6.5" bed of my 3G Tundra. Alucab was initially my first choice but it gets pricey really fast with delivery, and options, not to mention it is the heaviest in this segment. Right now, I'm deliberating between the Harker EDC, and the Snap Treehouse. Harker is the lighter and more affordable option coming in at about 12-13K with some of the options I would want. I'm torn on the soft entry door even with their newly improved material and bungee cords to tighten it across the bottom of the vehicle and below the tailgate. Its still in consideration due to the straight walls and the ability to mount traction boards, and water/fuel, shovel etc outside thus eliminating the need for a roof rack on the vehicle. The sleeping area size (best in class) is also a positive feature. Snap is really interesting to me due to the reviews here and the quality of their work, and the fact that they allow customization including tailgate deleat via a door (similar to Alucab).