I agree with ozaz, the Dell XPS 13 latest generation is definitely worth a serious look-- great keyboard, nice screen and good WiFi.
Samsung issued a color fix for the ATIV Book 9 Plus and the yellows now look pleasing when the machine isn't plugged into AC (there's a link to the fix in our review). I've used this fix on mine and the yellows are no longer bothersome.
The Yoga 2 Pro has single band WiFi, and I'd suggest dual band if you want the best possible connectivity. The ThinkPad Yoga is available with dual band WiFi and it's very solid (that machine is also reviewed on our site).