I am considering purchasing new speakers for my two channel audio system, and due to the layout of the room I would like to first consider bookshelf type speakers on a stand. The amp that I am considering requires speakers to have an efficiency of 89 or better. I would like to begin my search in the $1000 range.

Can anyone recommend speakers that might meet these requirements?

I tried a pair of old B&W DM600 , however they were not very loud [efficient], were lacking in presence compared to my old Marantz speakers, and had no sub lows that I could hear.