I would add Hawthorne Audio. Haven't heard them myself, but an interesting design of drivers for open baffle implementation. They have their own friendly and informative forum and first rate customer service.
Obscure companies making excellent speakers?
Found on the forum names of speaker manufacturers unfamiliar to me that supposedly are using new technologies or designs and as a result are making big impressions on fellow goners. Would like to see a list of these young and not so young companies that otherwise fly under the radar because advertisement just too expensive or not viable.