If you don't mind stand-mounted speakers, the Audio Note AN-E are good candidates for near wall placement. These have the advantage of being reasonably efficient and easy to drive, so they can be used with a wide variety of lower powered amps. The Audio Note line of speakers is quite lively sounding and very musically engaging. The sound is on the warm, full and rich side, not on the more analytical and technically flat and neutral side--if that is your taste, they will sound overblown in the mid-bass and deficient in genuine deep bass.
Another speaker that I heard placed very close to the back wall that sounded very good is the Gradient Revolution. Is is specifically designed to be very flexible in where it is placed and how it is used. I heard a pair in a small room, with the speakers only about two inches from the wall, it still delivered the goods. This one looks good too, and is narrow enough to fit your requirements.