Inna
Yes, Focal belongs on the list, as does Von Schweikert, Martin Logan, Vandersteen and plenty of others: household names (among audiophiles!) that sell uber-expensive models meant to be regarded as "statement" products. Significantly, the lower priced models in the these manufacturers' lines are often pretty good values.
"Giant-killer," I think, refers to the children's story "Jack and the Beanstalk". Though plenty of fairy tales have a dark and violent subtext, I don't think this term is offensive when used as it is in this discussion, to indicate an "underdog" that's performing well against formidable opponents.
Andrew