Good sound possible on a bookshelf?

Are there any high quality bookshelf speakers whose sound is not significantly degraded when placed on a bookshelf? Because of layout issues, I don't have space in my new living room for floorstanding speakers or monitors on stands (there is a far corner that could take a subwoofer). But I do plan to build a 20-inch deep cabinet surrounding the fireplace and TV that could also house equipment and support speakers. Budget range: from Axioms or Polk LSi9s to Revels. Thanks for all comments.