I think the Surface Pro line has great input lag. I write on it all the time. In fact the irritating things are the fact that it's a screen, not paper, and the

I think the Surface Pro line has great input lag. I write on it all the time. In fact the irritating things are the fact that it's a screen, not paper, and the plastic-on-glass feeling is slippery, and it occasionally runs out of battery. The upside is my notes all get indexed and are stored in the cloud (via OneNote, which has great pen integration) and the slightly worse writing experience is a small price to pay.