I have a new Macbook Pro (2008) and I am going to university next year. I would like to buy an external tablet to take lecture notes so that I am able to write text and draw diagrams, etc. What is a good tablet for me to buy so I could take notes in a calculus lecture for example, to be able to convert my handwriting to printed text and leave my diagrams as they are? Are there any programs for mac that will also enable me to do this? Basically I want to write notes and I want the MBP to convert my notes to text so they are easier to read.