Good advice so far, but I'd like to sum it up with this:
The Kindle Fire is a very nice ereader, but a poor excuse for a tablet.
The Galaxy Tab 2 is OK, if you don't mind Samsung's IU enhancements, and premium price. Although it is top quality, I found it to be too slow and not well designed.
The Nexus 7 is one of the best 7-inch tablets on the market, and the best for its price. The nightmare scenarios regarding build quality and bugs are way over-stated. I have had mine for almost a year now, and have had no problems, although it does sometimes lag a little, I think I can attribute that to my crappy internet service.
So, I highly recommend the N7, especially with recent price drops and specials. Go for it!
Posted from my Nexus 7 via Android Central App