do you have any animals, or small kids?
If either of these answers is no, then the rubber feet will work just fine. I have had my M60's in several different rooms over the years, some with plush carpet and i never had a problem with the rubber feet... If you do use the spikes, and the speaker tips, the spike probably wont be able to take the side load and break... I know from experience........
We have one lazy cat. I don't see him jumping on top but you never know. Are the spikes interchangeable with the rubber feet?
