Larryi's post makes me think that this is not as simple as tube v. solid state. There are topologies to also be considered. In the tube world, there is SET, push-pull, and OTL. In addition to triode, pentode and ultralinear designs (some tube amps have switches to select between these).
In the SS world, there are Class A, AB and D designs.
All of these have their own unique advantages and disadvantages, and each will work better with certain speakers than others. No one size-fits-all solution exists.
