Android tablet apps for school

Hey everyone,

I'm a medical student in the market for a 7"-ish tablet, mostly for school purposes. I'm smitten with the new Nexus 7, but as a very recent android convert, I'm unfamiliar with the productivity offerings on the platform.

I'm torn between the Nexus and an iPad Mini (would probably wait for the 2nd gen model). Many of my classmates use iPads, so I'm pretty familiar with the robust pdf and powerpoint annotating apps on iOS. Are there similar options on android? Is an android tablet a good option for students at this point?