Frank Muller did a great job on the Dark Tower series. I think Stephen King read Hearts in Atlantis. I don't remember his performance that well, other than it didn't bother me too much. One of my favorite performances is Eli Wallach reading Insomnia. Insomnia's not the greatest book, but I just love Eli.
I'm not a big fan of audiobooks as a replacement for actual reading, but I love to do it when reading's not possible. I only do it with books that I've previously read, or books that I would never find time to read otherwise (and yes, a lot of it is Stephen King).