" Sorry if I seem a little defensive but your post seemed a little condescending to me. I apologize if I took it the wrong way. "
no offense taken. (you took it the wrong way.)
to be expected on occasion, as peter writes in the cynical verse ... on occasion.
i have nothing poor to say about a paradox pack other than it is new. new is not a crime. just recently our own tester (dave the packraft god ?? ) used one, and liked it quite a bit. however he whined about the hip belt a trifle, and ... poof ! new hip belt arrives. that is all 100 percent good. and it proves my point ... exactly.
excellent though paradox may be, it is currently a work in progress, and even more so as per your intended usage.
i am all for forward progress. have invented numerous of cool things/devices/tools.
but here is the deeper thing.
it's a big mountain, and that matters. since you have sufficient experience to responsibly attempt such a venture, you are well aware of the risks. you are also well aware that Each and Every new'ish bit of kit you toss into the mix carries with it a risk. the risk of the mountain exposing a previously hidden weakness. (which it can do that to US as well).
my thinking is that when we have available to us, such a exceptionally well tested tool , a tool relentlessly developed over what is literally several decades of user experience, that we now have as an empirical fact that it works well in that application. then it looks irrational to me the accept even minor risk in exchange for the diminutive percentage of how much better another pack might be.
in my opinion, as a solo trekker, i would consider taking the proven tool the more professional and mature decision.
thirdly : you have a Dana pack. Dana Gleason is a good man. i have had three of his packs. they all had awesome pockets on the back, and they all caved when the load went over 60 pounds (maybe 55).
i own 2 of Dan's packs. they carry just fine. they also get shorter on demand, which is so entirely cool that it is hard to explain. as is the removable back pad.
either way you go, i think you'll be stunned by how much Paradox and Dan have raised the bar vs what you have now.
except for the rear pockets. because Dana's pockets Rock.
let us know how it turns out !