Best Convertible of IFA

IFA just produced numerous new laptops that are really interesting for my needs.

The options I'm looking at are the:

Sony Vaio Fit Multi-Flip

Lenovo Yoga Pro 2

Sony Vaio Tap 11

Price is not a problem and I am looking for something with good battery life and screen.

The Tap 11 was just an afterthought, my main debate is between the Vaio and the Yoga. Any other recommendations would be appreciated.