...definately not sensitive speakers... unfortunately!
LS3/5a's are .. epoch making classic speakers with a worldwide reputation - no less
They are small monitors (passive) used by the BBC (and others) in situations like radio stations, recording & mastering etc - for decades.
The JR149's are similar speakers (better in many ways in my view), and are very unfashionable because they are in funky cylinder shaped boxes. This means you can pick them up for 1/4 of the price of used LS3/5a's though.
They really need a bit of a meaty power amp though.
If you're looking for sensitive small speakers, beware of the fact that the published figures are (often) made up marketing blurb, and bear little resemblance to how difficult a speaker is really to drive. I say this bluntly, because it's often true - and you just can't trust the published figures (sadly) in many cases.
Try instead 'known easy to drive speakers' - if you want to go this route.
Often, you will find that in the drive for very high efficiency (which has it's own benefits ..like dynamics).. you will find you have to make other compromises - like in the absolute neutrality of a speaker.
JR149's (dont be put off by the look, they are superb)
http://cgi.ebay.co.uk/JR-149-ROGERS...ryZ14991QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
some rogers ls3/5a
http://cgi.ebay.co.uk/rogers-ls3-5a...ryZ14991QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
for sensitive speakers, try web searches using words like -
'audionote' 'snell' 'lowther'
I'd ignore anything too big, in your room.