Whatever you do, I would not go with any Sanus stands -- I have been using the "Natural Foundations" with my Polk R20 bookshelves (first in a HT setup, now in a two-channel room) and they're serious pieces of ****; from the day I got them, they leaned and were weak, not really stabilizing on any surface especially carpet (with the floor spikes installed).
I would stay away from Sanus speaker stands, personally.