I was a huge Stephen King fan right up until about Rose Madder when I lost interest, although I still believe The Stand was a brilliant piece of work. I still have the original 1978 hardcover as well as the 1990 updated version. In my opinion, the next best King work was with Peter Straub on The Talisman although it's follow up, Black House, was just so-so. I enjoyed The Gunslinger series as well although it took 20 years or so to finish that series and I was a bit annoyed that King placed himself as a character in the last bit of the story.
I have Under The Dome on my book server, maybe I'll give him another try.