Am I better off buying the new (13") MBA, or a Sony VAIO Z? http://www.sonystyle.com/webapp/wcs/stores/servlet/CategoryDisplay?storeId=10151&catalogId=10551&lan

Am I better off buying the new (13") MBA, or a Sony VAIO Z? http://www.sonystyle.com/webapp/wcs/stores/servlet/CategoryDisplay?storeId=10151&catalogId=10551&langId=-1&categoryId=8198552921644570897 http://www.sonystyle.com/webapp/wcs/stores/servlet/CategoryD... FWIW, I'd want to install Ubuntu on either one (anticipating that the MBA will be much more difficult in this regard.) Any advice?