I am choosing the middle one of the three, the $150. I already got my Macbook Pro and free ipod but they were out of printers in store so I haven't gotten it yet. I definitely want wireless printing, so thats worth paying $50, and paying another $50 you only gain double sided printing I believe for the $200 printer. I will rarely use it so its not that important. Printing papers for class will always be single sided, and any other documents for class I will just use on the computer itself.
Hope that helps. If you have an Airport Extreme, you could just get the $99 printer for free and plug it in to there for wireless printing. (I don't have one)