What to Read Next?

I finished J.R.R. Tolkien's Unfinished Tales this morning. It was such a delight, but I am now unsure of what I am going to read next. I probably won't start another book until next week when I get to Wisconsin. Part of me wants to go ahead and buy the other four or five Tolkien books that I want to read at some point. But last summer I read Gone With the Wind and I decided then that I was going to make it a summer tradition to read the 1,400 page novel. And maybe I should hold off on both Tolkien and Scarlet O'Hara, and read something completely different?

Oh, what to do?