KT 66 push pull vs 300B single end

Thanks very much for your detailed description. It clarifies quite a lot for me and tells me  I am headed in the right direction for my low volume listening levels. 

Since starting this thread I have comited to the purchase of a pair of AN P4 mono blocks to go with my Tannoy 12" MG's. The MG's are a 92.5 efficiency rating.
I have a nice little Sunfire Jr I may round out the bottom end with if needed. 

Thanks again