How about JmLabs Electra 905? Their sensitivity is 91.5, with a benign impedence so they're easy to drive. I have a pair of these my self, and love them. They are about 18 inches tall, and weigh about 30lbs each, so I don't know if they're small enough for you. Good luck.
Monitor Speakers - most sensitive
I'd like to find out what monitor (bookshelf) speaker models are out there that are very easy to drive with high sensitivity. I'm inquiring for any price range as long as they are very good sounding. Are there monitor speakers that have sensitivity above 90? I haven't seen any.