I use Obelisks for HT and find them excellent and better than conventional speakers especially because they allow a much wider sweet spot and give a more realistic acoustic landscape for more viewers and listeners. Somec59 has a point, however, that it does help to raise the obelisks a foot or so from the ground to get more realistic height. I have heard from other shahinian users they all models are good for HT. Richard Shahinian even went over to steffi Graf´s home to set up Diapasons and Hawks for HT.
Regards,
Florian Hassel