How about the Dynaudio Focus 110? They are close to the size you mentioned, and they include a foam plug to block the port, for use close to the rear wall. I personally own the slightly larger Dynaudio Focus 140, and I am quite pleased with them.
You might also consider the Dynaudio Excite X12. They were given a very favorable review in the March issue of Stereophile: "It sets a high standard of excellence in every meaningful sonic parameter." They are also close to the size you mentioned. I have not heard the Excite X12, but I personally owned the Dynaudio Audience 42 (the Excite line replaces the Audience line), another very diminutive speaker, and I was pleased with them as well. Good luck.
You might also consider the Dynaudio Excite X12. They were given a very favorable review in the March issue of Stereophile: "It sets a high standard of excellence in every meaningful sonic parameter." They are also close to the size you mentioned. I have not heard the Excite X12, but I personally owned the Dynaudio Audience 42 (the Excite line replaces the Audience line), another very diminutive speaker, and I was pleased with them as well. Good luck.