ok, so i'm just getting into the HT thing and i've got some newby speaker stand questions. 1. how much of a difference do the stands really make? i can put the speakers on my entertainment center and they will be around the same height as they would be if they were on stands. but will stands provide better vibration control? i read somewhere that controlling their vibration helps their sound. 2. do most speakers have some way of being attached to stands? i'm not about to drill some holes in the speakers to attach them to a stand, but i don't want them to be falling off if someone bumps the stand. any suggestions? the speakers in question are energy c-3's. thanks in advance.