I am a big fan of the Hang drum, though I do not own one. I do own a Halo which is the Pantheon steel version.
http://halo.pantheonsteel.com/Scales.aspx I have the Ake Bono
(C) F G Ab C Db F G seven tones.
I love it. The sound is amazing, it is hard to compare the two. Some on youtube have played or own both.
Someday I would like to get a Hang.