I think for most people it goes something like this:
Smith & Wesson >> Gerber >> CRKT >> Cold Steel >> Buck >> Kershaw >> Spyderco >> Benchmade >> Strider >> Chris Reeve >> Custom
There's lots of variation among buyers and variation amongst the offerings by the manufacturers and some people take a side path to Case XX or maybe RAT or Busse. Some people start at SAKs and end up at SAKs again after they go through the cycle.