Are you an Android person or an Apple person? How much do you want to spend? What size screen do you want? Ask yourself those questions.
I bought one of the new Samsung Galaxy Tab S's a few weeks ago, the 10.5" version. I like it a lot but I'm also an Android guy who rooted and debloated it almost immediately. I also wanted a bigger screen than my first gen Nexus 7, which was getting long in the tooth. If you're already into Android, I think it's a great option. I've also seen some great deals on the Samsung Tab Pro, which has similar specs though not as nice a screen. The 2nd Gen Nexus 7 is a great option for an affordable, smaller Android tablet.
If you're already an Apple person, iPad or iPad mini is a no brainer. It's probably the best option for a platform agnostic too. Especially if you're not the type to root a tablet and enjoy the benefits of such.
Figure out what you're going to use it for (seems like you've already done that), what platform you prefer, what size you want, and how much you want to spend. Then read some reviews from reputable tech sites and go from there.