I've had 2 pairs of Leki's, a pair of Komperdells and one pair of Black Diamonds.
Observations:
1) 3-section collapsibility is not worth the decreased strength when
compared to almost-as-short 2-section poles
2) twist locks (Leki and Komperdell) wear down over time and don't offer
much adjustment
3) the BD flicklock mechanism is stronger and can easily be field adjusted
when if it does loosen
4) Leki's have better grips and wriststraps (the cork ones with the x-c pole
like straps
5) Both Leki and Komperdell grips and straps can be put on BD poles
6) if you get the BD poles, throw away the half-baskets that are meant for
engaging ski bindings. Put real backets on them.
7) antishock is something additional to break and was as affective as I had
hoped
8) if you are going to use the same poles for skiing, make sure they can be
made long enough to kick and glide
From someone who is:
1) large and hard on gear
2) also skis a lot
3) cares about money