Suggestions on a tablet for university use?

Hello I was wondering if anyone could give me recommendations for a good tablet sub $200 that would be good for viewing textbooks on.

-Good enough display for reading text for extended periods of time.
-Good internet capabilities (ie no problems with WiFi, or loosing signal).
-Speedy enough for running apps and switching between books and the web and class related apps. Minimal lag.

I was looking in the Kindle fire series, but I am curious as to whether there are better things for the money.