Along with the already excellent recommendations, I'd like to throw in offerings from ATC and PMC. Other great options would come from the entire Mark and Daniel product line. They are a little known company whose main focus is building loudspeakers that do exactly what you are looking for. Lastly, there is an even lesser known company down in Australia called Lenehan Audio. They produce a marvelous bookshelf speaker called the ML1 that is worth looking into.
Good luck on the hunt!
Good luck on the hunt!