Convertible laptops with active digitizer?

School is starting up and I would like to get a laptop. I'm a sketching fanatic and I need a laptop that can be in ''tablet mode'' (such as the lenovo yoga series), and have an active digitizer for the drawing. I LOVE the Lenovo Thinkpad Yoga but it is hideous! Any alternatives? If you think the Thinkpad is the best option, try to persuade me because the appearance is a real turn off. Also, the thinner the laptop, the better. I have heard of the surface pro 3, but I'm looking for more of a laptop experience with an acceptable tablet experience as well.

Added (1). EDIT: I need the battery life to last a long time for when I'm traveling. The thinkpad yoga has UP TO 6 hours and that isn't long enough to suit my needs. The thinkpad is basically out of the question unless there's some outstanding feature that I'm missing.

Well in that case, go for apple mac book pro