So I think I have stumbled upon the perfect solution for my bed/rack needs. I've always liked the idea of the Leitner Rack, but the leg supports run to the floor of the bed eliminating a bed cover option which I need for security and out of the weather storage of my luggage and other items when traveling and simply on a daily basis. I fear the hard shell will crack over time and it's most certainly the most fragile option for off-road use. The bed cover swapped for a soft topper when needed is a great and reasonably priced option, but it still doesn't provide me with a place to mount my RTT and I am not sure I want it on the roof of the cab, lots of wind noise.
Nuthouse Industries of Ohio makes an aluminum rack called the Tech 2 Series Expedition Rack, it's very similar to the Leitner yet better in a lot of ways too. It has the option for removable cross bars that sit flush with the top of the rack, not above it, which I think is much better for keeping it below the cab and it leaves no bars sticking out beyond the sides of the rack. In my opinion this provides a cleaner look, less things to snag, and a quieter ride since it tucks behind the cab for more streamlined aerodynamics. They offer all of the side mount options for Leitner accessories (Maxtrax/Rotopax/Storage containers), but the biggest difference is their bed cover solutions. They offer a custom roll-n-lock coil setup that works like a Retrax, they also have removable and fixed hard covers capable of holding hundreds of pounds of static weight, both flush with the bed sides or raised for more clearance for items below like fridges on slides etc.
They offer lighting packages for the rack as well and a 2 ft shelf that rides above the bed for carrying more accessories. I like that it is custom built to spec for my individual truck and individually customizable to my specific needs. It's a bit more than I had told the other half I was planning on spending, but it appears to be the best solution for my needs and not much more than the hard shell/roof rack/bed slide option we were leaning towards prior. I'm not 100% certain this is the route I am going at the moment as it would certainly make my truck 100% committed to the Overland lifestyle 100% of the time, but it also still allows the secured use of my bed and a ready to go platform for my RTT and all of my accessories and gear.
Here's a recent Tech 2 Series Expedition Rack build they did for a Baja UTV chase truck, it spec'd pretty closely to how I'd build mine, less some of the light bars and obviously the crane lol.