what are peoples thoughts on this knife. It appears that it might be a constant in the spyderco PM2 lineup. Is it worth about $30-$40 more than the standard s30v PM2? I like blue and am thinking that it may be a good purchase. Just not sure if I want to wait to see if the price will change depending on demand. Also, how is s110v with rust resistance. I know it's reputation for keeping an edge.