The M22's are nice and as long as they are in good shape keeping them is a solid choice. I really like bridgmans idea of install in sliding shelves inside of the existing bookshelves so you could slide the speakers out when in use. I purchased industrial sliders for my component cabinet, they hold 75 pounds each. Work great! With this idea you can play with the depth quite a bit anywhere from 1" past the lip of the bookshelf to as much as 12" or more depending on the depth of your bookshelf. I'd love to see and hear about the results if this is how you go.
