Thanks to all who posted - you've given me a lot to think about. I suppose I can simply spike into my (rented) hardwood floors, then invest in some wood putty to cover the holes when I move...certainly a lot cheaper than *buying* a place in SF ;-)
One thing to note: the "Audio Selection" support cones and disks that AA sells are very nice, but the disks have adhesive tape on the bottom, to hold them in place, for example, on a shelf. I didn't remove the plastic film covering the adhesive, but after sliding the disks around over a few months, the film peeled off...sticking the support disks to my floors. Next time I'll try disks w/o any tape.
One thing to note: the "Audio Selection" support cones and disks that AA sells are very nice, but the disks have adhesive tape on the bottom, to hold them in place, for example, on a shelf. I didn't remove the plastic film covering the adhesive, but after sliding the disks around over a few months, the film peeled off...sticking the support disks to my floors. Next time I'll try disks w/o any tape.