The OP does not indicate the need or purpose of the knife choice but assuming they are for the wilderness or survival purposes and not just for whittling a weenie roasting stick over a campfire at a local KOA, I would like to pose a suggestion. Hopefully this won't hijack the OP's thread.
At the risk of being stoned, does the "bullet proof" warranty really matter if your knife gets damaged during a survival situation and perhaps becomes largely unusable putting you at risk of your very own survival?
As a case in point, I just read on another thread about someone batoning an ESEE 3 and it became damaged from batoning. If I need to trust my life on a knife I would want to know that it was "bullet proof" during the time I need it and not after the fact through a warranty.
Perhaps the ESEE 6 does fit this bill but it is not the thickest/strongest blade for all surivial aspects one may encounter far out in the wilderness, facing dehydration, hypothermia, starvation, to name a few. Perhaps an ESEE 5 would make more sense or even something with more length.
It is sort of like buying a boat that is touted as unsinkable but if it sinks the company will replace it. I am not sure if this would help at the time it was needed if it indeed sank.
For the record, I am not knocking ESEE products as I am a proud owner of one of their knives. I just think the warranty needs to be taken into proper context. Just my $0.02.