I'd recommend the Lenovo IdeaPad U430.
http://www.laptopmag.com/review/laptops/lenovo-ideapad-u430-touch.aspx
$700 gets you a fourth-generation Core i5, 4GB of RAM, 4lbs, 8 hours and 26 minutes battery life
No discrete graphics card though. And also 1600 x 900 (I really think you'd have a hard...