el gato wrote:If we make the assumption that most of the 'premium' offerings (i,e, not those targeted for budget-conscious buyers like single-sided pedals) have similar accuracy, what differentiates the 'best' PM nowadays?
If you take accuracy off the table as a differentiator, which I agree is appropriate with the current offerings, then the differences become specific to each individual's preferences...
You already struck portability as a criterion, so that does not leave much as a differentiator.
Is it OK to assume "best" would be total power? If so, then that reduces choices to hub, crank, chainring, and dual-side pedal and crank arm offerings.
Is it OK to assume that "best" means accurate left/right power? Then, that reduces offerings to crank arms and pedals.
Is it OK to assume that "best" means pedal dynamics? Then, that reduces the offerings to pedals.
You eliminated budget-conscious, so does that filter Favero pedals?
By your filters and criteria, it seems like the best power meter is either PowerTap P1 or Garmin Vector 3.
OTOH, if your best diminishes pedal dynamics in favor of freedom to use any pedals, then Best would be Stages V3 dual sided or Shimano's new PM (when it is ready for prime time).