Power Meters / Powermeters (SRM, Powertap, Quarq, Ergomo, Vector, Stages, power2max, P2M, 4iii, InPower, Cinch)

SRM , P2M, Stages, possibly that chainring based one from Powertap, any of the pedal meters etc.

I'd look at p2m first - the SRM looks better but empties your wallet and is harder to live with.

i'd like to stick to speedplay pedals

if SRM is a ballache then not too interested

what are the concersn with p2m?