Reading, Read Aloud, Audio books

On my "boys reading list" page, you'll see we've gotten through a number of books over the last year, mostly through audio books.  Still hope to get to Ann of Green Gables, Jungle Book, and Treasure Island.  After these, and the ones we have already read, what would you suggest?  Kind of at a lose of what to do next.

Not sure about the whole Harry Potter series, for no particular reason.  That may be saved for an individual read.  Youngest is working hard to get through J.R.R. Tolkien books, then wants to read through Narnia books.  Oldest is still working on Hardy Boys, almost finished with #2 with #3 put on hold.

Would love audio books, I think, so they can listen and work with legos, thinking puddy, or other finger related things.  Suggestions welcome!  If it's any help, one is in 5th, the other 8th.