Its all in the wrists
My reccomendation - Don't try to save money on poles
I have a pair Leki Makalu Anti-Shock and they have literaly saved my life.
I have had my poles for about 5 years now, they have gone to Nepal, Kyrgyzstan, Hawaii, Washington, the Tettons, Europe etc. Before buying them I had huge knee problems, my knees and angles would hurt so much I could hardly walk for a day or two after a 20 Mile weekend. Now they're sore, but not comparisson.
Various thoughts:
1. Antishock is all about Tennis elbow. If you plant hard (ie use arms to take 30% of weight) on your way down enough time you'll put strain on your elbows. I find that my elbows get sore when I don't have the antishock on
2. Straps matter a lot, if it slips you'll have to tighten it every few minutes. Look for wide straps, covered in soft microfleece if possible, you'll save a lot of blisters, liner gloves etc.
3. Its all in the wrist. I have friends who break their poles twice a year. Every once in a while your pole will get stuck in a crack, between branches etc. Its super important not to bend the barrel. Recognizing when it gets stuck, and quick pivoting your arm to exert force straight through the barrel saves your pole. Avoid jerking it up as the mechanism can take that much force. Twist poles are much easier for men than women as you need quite a bit of torque to tighten it enough for it to take your magnified weight (think going down the Garfield trail etc.)
4. Buy it at REI. Poles are one of the most likely things to break. While mine seem to survive, too many of my friends break them all the time. REI can be seen as a lifetime warranty for only $5-$10...much cheaper than what an insurance company would give you.
Oh yeah, I 'm sure you want to hear how a pole saved my life. On my honeymoon in Hawaii I was up at the Seven Sacred Pools (doing some stupid bushwacking), when I approached a pool overlooking a 100 ft waterfall. My big plastic boots slipped on the rim of the pool sending me topling backwards 8 feet. I hit my head hard on a rock as I hit the 1 ft deep water. What saved me was that I had my poles on my wrists and as I fell I spread my poles wide hitting the rocks hard, absorbing some of the shock of the fall. B/w the poles, my pack and my thick head I just survived to live another day.
Poles are like hiking boots. They're with you every hike you're on. A bad pole will remind you of your decision with every step. Spend the $130 bucks, you won't regret it.