[Ask HN]: Laptop advice needed

I am in the market for a versatile, yet simple laptop. I have a new MacBook Pro, die hard Apple user. I have 2 x 750gb and 16gb of RAM in it. This is for an idea of starting a new venture and on a shoe string budget. Some thoughts I have: - I really like how simple the cases are on MacBooks and MacBook Pro's. I know the first Chromebooks had a simple case on them too. Companies like HP, Lenovo, Dell, Alienware are just making these "outer space" looking products. - 3G or 4G LTE Modem built in. - Motherboard that supports lots of RAM, maybe 16GB? - Windows, Linus, OS X (10.8), required operating systems. - 13 inch preferred, but 15 would be OK, 11 too. Can anyone help guide me in a direction of provide thoughts?