High efficiency bookshelf speakers for 300B SET

I am thinking of jumping into tubeland with a 8-9 watt 300B SET amplifier. I have been looking at vintage horn speakers such as the Klipsch Cornwall and would love to be able to own them... but they are too large and heavy. I need a good pair of very sensitive bookshelf speakers so that I can use them in a college dorm room. (imagine me trying to get away with the Cornwalls...)

I'd prefer $1000 or under used. Can be newer or vintage models... as long as it is musical, dynamic and represents the frequencies well. I listen to a lot of genres...