The Wright wpp100c is actually a better choice than the wpp200c. It uses tubes that are better suited to phono-stage usage, and are not in demand (thus: cheap!). the Framed-grid 6Er5 is a much better gain tube than the 12ax7 for this application. The only reason George changed to the wpp200c with different tube choices (12ax7s instead of 6ER5) is that he felt he didn't want to use up the world's supply of 6ER5s (though he maintains a nice stash for sale to wpp100c owners at ultra-cheap prices, usually about $8/ea).
-Ed
-Ed