I have found that for both touring and backpacking I can go lighter than just about everyone I have met on tour or on the trail without spending any money on Cuben fiber and the like. That stuff is OK for shaving the last few grams, but before worrying about that you should pick all of the low hanging fruit first. I found that by the time I was ready to spend on Cuben fiber and the like I was already down to a 10 or so pound base and that the extra hundreds of dollars to trim a few more ounces were not worth it.

I am really baffled when I see folks carrying a bunch of extra stuff and haven't cut weight in the easier and cheaper ways before they spend $$$ to save a few ounces. I advise starting by leaving stuff you don't need home followed by using lighter items without huge pricetags and then evaluating if you are already light enough to not need to spend $$$ to go lighter.

Bottom line...
In my opinion it doesn't make sense to spend hundreds of dollars to save ounces when you still have choices that allow you to save pounds for cheaper.