Go with the cuben. As others have said, both are great. But if money isn't as much of a concern and as you live in Texas, the HG would be my choice.
As far as durability - if you treat it right, cuben will be plenty strong. I have seen it get some abrasion tears under heavy use, though, so it isn't quite as tough as silnylon.
For scouts or younger folks, silnylon is a more resilient choice. For adults that generally are easier on gear, cuben fiber is plenty durable. Go with the HG version that and don't look back. Your back and legs will thank you in the long run.