I used to use sand-filled Target R2 stands with my ProAc Response 2 speakers (attached with pea-sized bits of Blu-Tak, which should be equivalent to poster putty at any office supply store).
They were very expensive (MSRP $700), and I suspect that these Osiris stands would also work just as well:
http://www.sigsound.com/NU&DInfoPages/OSIRIS.htm
Hope this helps!