Out of interest - if you don't plan on needing to grip to rocks at weird angles, do you know if the Echo's much good on the street?
I'm in love with my Stikys at the minute, but I'll need new ones sooner or later.
If everything you ride - or almost everything - has square(ish) edges, and is 0, 45, or 90* - is the extended life worth it, or are they really bad even then?