Kenny
Thank you for your comments. Perhaps you would like to set up some testing in your room to see if the isolation is audibly influencing the sound. The book will give you direction. Take care that with speakers they are height matched if testing footers.
I understand your appeal to sideways movement for variety, and it could be argued that I have done so in multiplying different genres of speakers versus seeking "the One." I find regarding components, given the multiplicity of system configurations and vastness of the performance spectrum, even in seeking variety one need not settle for a sideways move. When I upgrade electronics, it must advance all my speakers (genres). Sometimes it can be done more economically than at other times. :)

