Tim, you mention that thicker aluminum is important to you, check out Alum-Line. In 2009 I took them my measurements and layout that I wanted, they built it to my specs including escape door size and location and D-ring location, and included diamond plate wheel chocks. Custom spec all aluminum for less than the cookie-cutter Featherlites built next door in Cresco IA.
I doesn't have the slick cool factor of an ATC but I'm at 110,000 miles including a lot of pounding on rust-belt interstates and it's as sound as new. Only regrets is I'd have had backup lights and camera wired in.
I've attached a couple goose necks from their web-site. -
Oh, it doesn't leak water or dust either.