I have about 30 gerbers, probably more. the suspension, tread and crucial are of lower quality than the rest in my opinion. my favorite is hard to say, I like the 600 series, proscout and the old tools. I will admit that 10 to 15 years ago when leatherman tools had such small pivots the gerber tools had much wider and stronger pivots. the flik fisherman is a nice model but the drivers. the deisel is my favorite new tool from them.
Wow, sounds like you've tried them all scrappy.
I still need to get me a Flik Fisherman.