Note worthy Omni Directional Speakers..

If you mean more than strictly omni then I would add Shahinian.

Here's a Duevel Planets review on SonicFlare, if anyone is interested.

How about the grandaddy point source loudspeaker? Originally designed and built by Stewart Hegeman and now kept alive and current by Don Morrison of Morrison Audio. One of the only "real" virtual point source loudspeakers as well as one of the best woofer enclosures in the business.

FJ Om's, possibly available used in the low $2,000 range, but rarely listed. I had the pleasure of hearing these last year at Venus HiFi in East Lansing, MI. Great sense of ease. Uncanny soundstaging. A really enjoyable set of speakers.

Well, if you want to consider "grandaddys", you might look for a pair of Sonabs designed by Stig Carlsson. He first developed omni radiation speakers in the 1950s in an attempt to replicate the sound produced in the concert hall.

They have not been imported for a couple of decades but different models show up used from time to time.

Here is a link to their history -
http://www.carlssonplanet.com/history.php?PHPSESSID=10571310094a7e07d0cbf02dd8bb9f14