Steve-
Just for the record, an 845 is not a "low powered SET amp".
Because of the ~25wpc it brings to the party, most SET adherents would consider it a muscle amp. This gives you real versatility, and greatly opens up your options for speaker matching. In a relatively small room like yours, you should be able to drive almost any moderately efficient speaker, although you still need to watch for unfriendly loads. With a relatively efficient and refined speaker like the da Capo you may want to consider a lower powered design.
Good luck and have fun.
Just for the record, an 845 is not a "low powered SET amp".
Because of the ~25wpc it brings to the party, most SET adherents would consider it a muscle amp. This gives you real versatility, and greatly opens up your options for speaker matching. In a relatively small room like yours, you should be able to drive almost any moderately efficient speaker, although you still need to watch for unfriendly loads. With a relatively efficient and refined speaker like the da Capo you may want to consider a lower powered design.
Good luck and have fun.