Every concert I've ever been to has tubes, amps, speakers all bouncing together.. so, why not at home? I'm not nuts about the styling, though.
I wonder if all that isolation hooplah is just that... a bunch of hooplah. I've never heard make much of a difference.. except some sorbothane feet once made my dac sound a little less crisp. Using the stock feet vs. vibrapods, sorbo, wood chips, innertube, bubble wrap, or various foams have yielded little to no difference from each other for me. There's so much vibration in the air I can't imagine just isolating the feet would help. Mass loading is another story, though.
Maybe these speakers are so heavy, the amps aren't as affected by the vibrations.