I recently purchased (though I am always looking for better)bookeshelf speakers with the same space limitations that you have at your winter home. I ended up with Castle Acoustics Isis speakers, that have since been replaced in the line with a newer model. The Isis started out on bookshelves but have since been moved to stands that are slowly inching ther way out into the room. They were designed for close to the wall placement and sound pretty good when placed this way. Moving them out a foot ot two increases the depth of the soundstage. I also home demoed Linn Tukans (recently discontinued) and they as well worked close to the wall and on the bookshelves. Most of Linn's small speakers have been designed this way, though I do not know how they do it with a small rear port, but they do. The Castle's are very accurate with no mid bass hump and are very good for classical music as well as small scale jazz etc.. The Tukans sounded very colorful and musical and I also liked them but prefer the the more accurate midrange and bass (whats there) of the Isis. I just listened to Solilquy's small speakers and will be going back for a second audition in a couple of weeks. I like these a lot but did not inquire about placement at the time. Linn is also coming out with a replacement for the Tukan. Efficiancy is a little lower than your specs, 87db for the Isis at 8 ohms although they present a very stable load (I run a class a/b amp and it runs reasonably cool. The Tukans are 87 or 88db at 4 ohms and the Soliloquy 88db at 8 or 10ohms. Again I do not know if the Soliloquys would work on bookshelves. Good luck.
