I have a ti pe atr. I have a love/hate relationship with it right now. It has blade play that can't be repaired by the factory (not really a big deal, but it drives me nuts). I've offered it for trade, but no-one bit. I'm trying to live with it, as it's still very smooth to open and does have a nicely shaped handle. I have faith in the lock also.
I've seen the stainless ones are going for pretty low prices lately and think they're a great value. I do like the considerable length of plain edge at the tip on the serrated version too. Almost 25/75. In the end, I usually try to stick with pe though. The black ones always caught my eye too, but I'm not sure how they hold up personally.
One thing about the knife that I've wondered, after hearing it has an origin involving MBC, is what's the idea behind the blade shape? Perticularly, is there a specific reason behind the bump? on the spine? I've considered grinding it into more of a basic spyderco shape before, but don't want to reduce any collecable value it might have. Anyone know about that? Thanks.