No actual recommendations, but things I'd consider:
* Cheap tablets have low-res screens, which is a pain if you're planning on surfing the web a lot. It's not so important for movies or ebooks. They also have a narrower viewing angle - less important, but irritating.
* Unless you're planning on gaming the cpu speed isn't that critical, it'll speed up web page rendering and app startup, but unless you directly compare a fast and slow tablet side-by-side you won't notice in practice.
* SD cards are handy for films and the like, not so useful for apps - lots of Android apps can't be moved to the card, which means you run out of space either way... That said, it's a plus point.
* Cheap tablets feel cheap, how important that is to you is a different matter.
* Not sure if you can still buy tablets with Android versions other than 4, but if they're still available avoid.