I've been fortunate enough to have 3 Basenjis. They are brilliant pets and quite unique. They were originally bred by pygmies as hunting dogs in the Congo. They have no bark because their voice box is suppressed so they are ideal for flat living. Most Basenjis however do manage an occasional yodel!
They are also fastidiously clean. Almost no doggy smell and ooze personality. Full of mischief and incredibly loyal. Get along great with cats.