I'd still read them. I read the books first when I was about ten, the year before the first film came out. I really enjoyed them, though there were some parts that dragged (in particular there was one part in the middle of the second where I genuinely thought I might give up). However, there's a wealth of good stuff in the books, which I have reread twice since then, and I think they're great in their own right. Even if you don't enjoy them, it might be fun to read them to see the effect they've had on fantasy - and literature in general - over the past sixty years.
I liked the films a lot. I think a lot of the changes they made produced better films than if they'd stuck to the text. Certain characterisation changes rubbed me up the wrong way -
- but otherwise they're fine adaptations and preferable to the Bakshi version by a mile. That was hilarious.