Hi, I need to chose new laptop to replace my old Asus A6Km. I'm interested in two models: Dell 1558 and Lenovo G 56o. Both have the same CPU and other elements are similar. The point of my interesting is to have good keyboard, because I'm going to write my PhG dissertation on this machine. I'd like keyboard not to be flexible, which is very common for new laptops. I'll be grateful for any suggestions about these two laptops, especially about keyboards.