There are too many out there. I would like a light laptop, not tablet. I want a 14 or 15 inch screen. It most have backlight. I type at night, a lot. I travel a lot. I need something durable. But, basically only for email and using company database and surfing net. Many documents open at once. Has to be fast. Good battery life. Really want windows 7. I would get a Mac with retina display but my whole office uses PC so I need the same OS. I can spend up to $1500 or so. I was looking at Lenovo thinkpad T440 with upgrades like better display and more RAM. What do you suggest?