So, here's the old debate that I need some help with. I have a set of RT5's and am looking at some MK's. The polks are resting on some MASSIVE stands, 28" high and filled with sand. They weigh about 40 lbs each. Anyway, what is everyones opinion on the best way to attach the speakers to the stands for best sound quality. Some say to decouple them with spikes, others say couple them with something like bluetack, what does everyone think?