My vote is FES. 2 seconds from gliding to power, imperceptible drag.

Mine is a self sustainer, not SL, but a SL is under development and
has flown successfully.

When widely available, I think it is a strong contender.

At present it would not be all things to all people – e.g. not coping
well with 800 fpm sink, and more limited range than petrol models. But
all glider choices are compromises – you have to pick what most
closely suits your priorities. FES suits mine.

Chris N.