What should my next PC be?

I have been looking for a new computer, and I would like your help. My first choice computer is the Lenovo yoga 13 with an i5, 8GB ram, 256GB SSD. (I should say I am in Canada). My second choice is the IdeaPad U410 Ultrabook - 43763KU (http://shop.lenovo.com/SEUILibrary/controller/e/webca/LenovoPortal/en_CA/catalog.workflow:item.detail?GroupID=458&Code=43763KU&category-id=A97AF09887B40D0E0BD116354F206E63). I would have to update it to Windows 8 and probably the touchpad drivers too, but it is only $830. My current PC is a Gateway NV53 with 4GB of ram and a AMD athlon II X2 M300. I need a computer that can run Guild Wars 2; my current PC can but only on low graphics. I want a computer that is 13 to 14 inches and can last me through a day of school. My current PC only has 3 hrs of battery but I can stretch it to 4 hrs. Any suggestions? I would be willing to pay $1500 at most. I need at least 256GB of storage space. Thanks for your help.