Hi,
regarding the last question: it should run 23/39 with 0.2 belt and enough bulge to take an ss6 full salvo and still be able to OH (even with a "fat" crew, as in my case, except for a couple of sailors that are lvl 95-97, all other are 120). For the firepower and the speed I think it is a deadly BB in the right hands. You can easily make 200k+ damage in a GB or in WaW.
Ade