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.
jessleo
Disclaimer becuase I sell them, but the Joseph Audio RM7Si MKII's, as they are front ported work great on bookshelves.
I'm using a pair of Tyler Reference Monitors on shelves and these front ported speakers image amazingly well and sound great.

While they may sound even better on stands, they're great on bookshelves too.
Yes,but Compromising.
Revel M20 good choice.Flush mount setting at back of speaker.Not to fussy with positioning .Good idea to give few inches at back to breath.Supplied with shelfmount feet as standard.Remember grilles extra.Well balanced speaker .Not the M22,rather the M20's.
Thanks for all the good, rapid suggestions. The only one menioned that I've actually heard is the Joseph, which I liked a lot. Living in Bellingham, WA with nothing but box stores in the vicinity makes auditioning difficult, but I'll head for Seattle soon and check out some of the others.