I have had very good luck coating silver gelatin on Fabriano Artistico Extra White watercolor paper. It hits a middle ground between emulsion that enters the paper (platinum) and emulsion that sits on top (gelatin on baryta). I'm recording my research at this address: http://dwrphotos.com/blog/EmulsionResearch.htm
There is picture of a 5x7 neg contact printed on FabArt with silver gelatin emulsion entered on Aug 8-9. Like all papers with a slight tooth, flatbed scanning creates the appearance of fog. The original has wonderful dmax with rich, dense blacks and clean highlights.