I'm looking to buy a digital piano and am seeking advice on what type is best for me.
Some background on my experience and interests: I have taken lessons for around 5 years (8th-12th grade) and I have played recreationally in college for about 2. I had a heavy workload last year so did not play at all; going into my final year as an undergraduate I'd like to pick it up again. I am mostly interested in classical music. I plan on going to graduate school and plan on bringing the keyboard with me.
Important features: A must have is a touch sensitive keyboard. I need the keys to respond to the force I am exerting (e.g. playing forte or piano). Another crucial aspect is that the number of keys do not restrict my repetoir; I am stuck between the 76-key models (cheaper and more compact) and the 88-key ones (more complete).
My questions are: 1) what is more preferable for someone like me, the 76-key or the 88-key? Why do some keyboards have more keys? 2) what is the difference between touch sensitive and weighted? And are there advantages to having one over the other?