I drilled a Crash for a customer today........
Drilled it with the pin 5in away from his PAP and the CG 4in from PAP.
I watched him throw several games with the ball, and this ball seems much more tame on the backend than the VooDoo(he has one drilled 4.5x3.5). The VooDoo seemed much stronger on the backend. They both seemed to have about the same kind of "impact" and pin carry.
After about 5 games and the oil moving down a bit, he had to move his feet 2 boards RIGHT with the VooDoo, and about 5 boards right with the Crash.
I do not know if this information is going to really help you, I just figured I would offer that story.
As far as your arsenal goes, I would tend to agree with Rick. If you set it up like this I think you would be covered on almost everything:
Super Freak
Unleashed
Triple Threat
VooDoo
(you seem set on the Crash, so if you have to get one, put it here, just drill it with like a 5-5.5 inch pin from PAP)
goodluck
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Owner/Operator
C-G Pro Shop