I've tried many Benchmades. I currently own 3. The Ritter Mini Grip, a plain green 940, and 581 Barrage (de-assisted). I love all and would highly recommend any one of them without hesitation.
If I could only keep one it would be the 581 by a wide margin. With the caveat of it having to stay de-assisted. I really liked it as an assisted knife, but after I removed the assist mechanism it brought it to a whole new level of amazing. I have beat the hell out of that knife and it just keeps coming back for more.