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

The remaining 5% of my motivation is because I'd like to play with some home aero testing too but I'm less clear about whether that requires more accurate (as opposed to precise) data.

Precision is important to see whether any changes have been beneficial, accuracy is only important if you're in a pissing contest with people on ttforum bragging about how low their CdA is.