Good points Brendan about the Paradox pack. To be fair, I haven't had much experience with bottom-attaching belts, so there may be something I'm missing there. Though, from the little I gathered when I got to try on the Paradox, the shape of the hipbelt was pretty essential in the way that it wrapped. (Keep in mind, I also have and odd hip-bone structure, so the traditional pack fitting doesn't work well for me.)
I like Dave's single stay system, and I have some plans for incorporating a hybrid between his bottom attachment system, the Granite Gear method, and some kind of Al stay (originally I was thinking dual, but Dave has me reconsidering that). We'll see what happens when I finish this Master's program in the next 3 weeks or so. There is a lot of pent-up stuff, so we'll see what comes out when.