If you may be in the market for a new iPad, here is an article comparing the different models. It's also rumored that Apple might release a new version of the iPad Pro sometime this year.
Now, to go with your new iPad here is an article with troubleshooting tips that will be helpful if your iPad should act up a bit. Might be a good idea to place an icon of this article on the screen of your iPad for future reference. That's what I will do.