Hi all,
It may depend on where you go to school, but I just bought an iPad and a keyboard for it and that has been enough for me. I just download the lecture slides and take notes directly on them using Notability. Notability is another app that will allow you to draw/write directly on the slides but still be able to add your own typed notes. I like it.
In my class, it's a mixture of iPads and laptops, with a few people still printing out notes. Most of my classmates with laptops have Macs, but I think that's just due to personal preference.
Hope this helps.