On Tuesday, March 3, 2015 at 2:38:37 PM UTC-5, wrote:
Any thoughts on the best stand alone Vario on the market? What is most accurate?

I think you'll have a hard time finding someone with extensive experience with all of the current offerings. Note that performance will be very heavily dependent upon proper installation (e.g. don't share the TE with a mechanical vario, don't share the static port with anything that adds volume or leaks) and configuration.

Accuracy is easy. Filtering is the interesting bit.

Butterfly seems to have the best wind info at the moment based on user reports. We hope to change that before too long.

Evan Ludeman (moonlighting with CNi)