I own each of them and the best "value" and best blade design IMO belongs to the Ontario Rat 1.
Was never really fond of the Blur (although I still own 2) and while I like the Tenacious (and the related models) it does not provide the best value especially considering the continued use of 8Cr13Mov steel and a 3.375: blade as compared w/D2 and a 3.625" blade on the Rat.
The Blur w/its higher cost w/a 3.375" and Scandik 14C28N blade and a blade shape what is the least useful, IMO, cannot compete w/either the Tenacious or Ontario Rat 1.
But, if you're like me, you'll just end up buying all 3 anyway. LOL!!!
BTW, I bought all of these knives very EARLY on and I would never consider buying them again now. I keep them only for "completeness" but I really have no "need" for any of them. In fact, I'm considering selling off most of my earlier Kershaw and CRKT "budget" knives just to make room in my safe for others.