It depends on the way you take notes and the way your classes are structured. I take a lot of engineering and math classes so my notes involve a lot of numbers, symbols, and diagrams. Thus, I use notebooks since typing out the symbols on the computer would take too much time. However, if I had classes that require me to write down a lot of words, I would consider using my mini-laptop which I purchased for University (a Lenovo X120e in case you were wondering) since I can type faster than I write by hand.
I view tablets as more of a notebook replacement since all of your notes can be stored in a single device and can be easily sent between other electronic devices. However, if you get a tablet you have to worry about whether you have enough charge to last for you entire day. While this may seem like no big deal you may find yourself very restricted in your day jumping from plug-in to plug-in. Plus, if you are missing content from looking at your page while you write, writing on a tablet may not change that very much.
I would recommend sticking to pen and paper since it is very simple to add in side notes, draw pictures, and write out weird symbols without having to worry about battery life. However, if you type faster than you write then perhaps you should getting a device with a tactile keyboard that is small and has a long battery life (you could also get a convertible if you really want a touch screen). This is great for carrying around and you should be able to type out your notes no problem (if you feel that is effective for you).
Personally I take all of my notes in notebooks but I carry my mini-laptop with me as well. This is great since all of my classes post online content and some assignments are posted (and sometimes handed in) online.
Regardless, you should evaluate what your learning style is and adapt your note taking tools around that. Hope this helped!