I would be interested to see a side by side comparison. Even if the quality of the Paragon isn't as robust, you could afford to replace it and still save money. It sounds like distance hiking with the Paragon may also be more challenging than the Epic.
For an extremely robust solution you could always go for a made in Australia One Planet Polar Pack. I believe that the cost would blow ULA and the Paragon pack out of the water. http://www.oneplanet.com.au/polar/polar-pack.html :)

