I don't know those specific knives, but I have a Benchmade, and it is excellent.:thumbsup:
If I may suggest, regardless of the knife you choose (Kershaw is not a bad brand either) try to get a
good quality steel for the blade.
I have found the D2 steel to be excellent for knives, and my Benchmade is a D2 blade. (note the D2 steel rusts easier as well- so keep it lightly oiled)
I also have an older Kershaw assisted opening folder, and the blade on that (440C I think) does not hold an edge anywhere near as well as the Benchmade with the D2 steel.
Overall build quality of the Benchmade is
slightly better than the Kershaw as well; however other than the blade, the Kershaw is a fine ECD knife. The Spydeco knives have a strong following, and are well respected. My personal opinion leans heavily toward the Benchmade, as I feel the quality and attention to detail is
slightly better in general than Spydeco knives, considering the price range. You can certainly do better than Benchmade; however you will pay for it...