Comment I recommend the Helix 2 (Score 2) 78
The Helix 2 is a more reasonably priced convertible 2-in-1 from Lenovo. The screen resolution isn't quite as high, but it's still a very reasonable 1920x1080 on an 11.6" display. I've run the thing on batttery for 8 solid hours doing standard office type work with wifi enabled and it performs very well.. and unlike the Yoga 3 it is truly a fanless design.
You might want to hold off until the "pro" keyboards that include the addtional battery become more widely available. Those should boost the battery life up to around 12 hours or so.