I really wouldn't say that IT is suitable for an 11yo child. My 15yo has just read it and I had forgotten how bad it is in places, especially the section where it talks about Beverley and her Dad, it is really disgusting. Even DD's teachers raised an eyebrow at her reading it. When DD read some of it out to me, I was horrified.
If I had remembered, I wouldn't have let her read it :(
The Stand is a good book but a long read.
I like a lot of the early stuff too, Cujo, Carrie, Misery, Christine, Firestarter. The Green Mile.
I also like his books which have several stories in, like Four Past Midnight or Skeleton Crew. There are some great little stories in those. The Mist is one of my favourites.
Thinner written as Richard Bachman is good too.