Just checked AudioAdvisor again. The recommended speaker stands for your Diamond 8.2 is Target FS series. Only $80. PE's high mass stand fits my B&W 602s perfectly. Those are massive book shelf speakers.
Target HR Series @ AudioAdvisor ($199). High Mass Metal Speaker Stand @ Parts Express ($113). Or Atlantis Pro Stands @ Audio Concepts ($169). 24" to 28" height. Fillable column(s).