In order of size (and likely corresponding average price you will find them at, although there are always bargains to be found); Klipsch Khorn, Belle Klipsch, Klipsch LaScala, Klipsch Cornwall, Klipsch Heresy All have the stunning clarity and speed of horn drivers, are more 'conventional' looking, utilitarian if you will. MUCH cheaper on the used market. Fantastic with tubes - Don't bother IMO with solid state - go another direction. Will sound even better with some modifications (search archives here, on Audioasylum, and on the Klipsch forum).
Marco