Art 300 is a beautiful paper. I haven't seen any evidence of yellowing-it's coated on Hahnemühle cotton rag paper. Not sure why anyone would call images on Art 300 'flat", since it's a variable contrast paper with a nice tonal range. My only suggestion is to buy some Art 300. We're lucky to have such a fine and unique paper--so buy it before it gets discontinued and the remaining stock triples in price, and everyone laments its passing.