I'm considering a new knife and not sure which one to get. It will be a benchmade with an axis lock for sure, just not sure which model. Here are a few I am considering, 940, 610 Rukus, 707 Sequel. Of all the Benchmades with the axis lock which is your favorite and why? I have a 921 switchback and a mini grip already and they are great knives. Gotta love the axis lock!!!!! Doug