Wow - that is a very loaded and subjective question.
It really depends on your stroke, the balance of the cue, type of joint, wood composition, and so much more.
Now here is my opinion and a possible analogy (for whatever it is worth)...
Cues are meant to deliver a cue ball in a very straight line, upon impact to either continue on a straight line (follow, stop or draw), to take off on a tangent with no spin, and to take off on that tangent with some spin.
So now for the analogy:
I will use automobiles to maybe describe my feelings…
I have found Tascarellas to be solid players built on a strong frame much like a touring sedan… Solid, consistent with a very firm feeling to them!
The Scruggs and Cochrans are also very solid but have a bit more feel in the suspension where the curves can be taken more aggressively or in cue terms more action on the rock.
The Black Boar and Vollmers are bit more lively since maple is more part of the construction (hard woods added for weight and balance) much like a very responsive sports car on corners. Great performance, lively feel and great control of the rock.
Now the ultimate is when you can have the best of both a solid hit on straight shots (much like a touring sedan) with some lively feel when you need to put action on the rock (much like taking a turn with a vehicle) and for my stroke nothing beats a Half Joint Searing (I understand the Ivory over SS by Searing is even better – hope to test that one day since this joint is very limited in production).
So for an investment, you cannot go wrong with any of the cues you mentioned and you have to evaluate your stroke and game style to figure out which way you want to invest your money. You either buy a player or a closet queen (have more closet queens right now and still searching for players).
As a peak, here is my
Cue Collection (picture taken in 2009 and some are gone including the BB but the half joint SS Searing is my daily player).
Again, the above is an opinion from what I found for my stroke.
Other opinions and inputs to the OP are expected.
Myron