How do you use your poles?
Are you using the wrist strap to give you a mechanical advantage by pushing off with them and using your arm muscles to help you go up and down steps/obstacles?
If so, I would advise against the lighter poles.
I just don't see the skinny carbon poles being able to repeated support my full weight the way that I use them.
In my opinion, using the poles without the wrist strap is missing out on the advantage of using hiking poles….spending a lot of energy clenching strapless handles also seems like a lot of unnecessary work too.
If you are employing a "two finger" swing while holding your poles, you honestly are not using a lot of energy to hold those heavier poles, so I don't think that the lower weight is giving you a huge advantage.
In my case, I am following the techniques from this DVD:
http://www.amazon.com/POLES-Hiking-Trekking-Walking-Jayah/dp/B0015GV6UQ/ref=sr_1_1?ie=UTF8&qid=1314744275&sr=8-1
Anyway, my point is, once you know how you are using your poles, you can determine if the skinnier carbon poles will match your style of hiking and how you use the poles.
For me, I am conservative and like to think that I can use my hiking poles like crutches if something bad happened to me.
Skinny poles would not work for me in that case.
Hope this helps.
-Tony