K7JBQ: The level 33 Callys are probably the most popular ball on WGT, but for my money the Volviks offer the most "bang for the buck. A little more expensive, but longer,more spin and slower meter:
"most" may be true for your preferences - granted!
But, in numbers, it's not the case.
The volvics' price is 160% of the Callies' price (400 / 250), which I find a steep difference, and the numerical gain (which I would not use to compare items) is negative:
L33 Callies cost: 22 cr/dot, the Volvics cost a lot more, 29 cr/dot.
Nevertheless, I'm gonna try them!