By request - My Kershaws...
From left:
Model 1600 - "Chive" (420HC stainless) - $49.95
Model 1660VIB - "Rainbow Leek" (440A Stainless, titanium oxide coated) - $99.95
Model 1660 - "Leek" (440A Stainless) - $69.95
Model 1550 - "Blackout" (440A Stainless Tungsten DLC coated, Polyamide handle) - $89.95
Model 1640 - "Vapor" (AUS6A Stainless) - $35.95

All models (except the Vapor) are made in the USA. They all (except the Vapor, again) also feature Kershaw's "Speed Safe" assisted-opening feature... that is, there is a "torsion bar" (apparently, a fancy name for a spring) in the axle of the blade that flips the blade open... Don't mistake them for a "switchblade," though. To be a switchblade, the knife has to have... well, a "switch" to activate it... On these, the person has to physically start the blade in motion and the spring kicks in and finishes the job.

The Blackout was my first Kershaw. It's been used pretty well over the past few years. The Chive is really cool, because it's so small...