Personally i would take a top quality Pearl or Marble for that matter over any black ray but i'm in the minority,black and white is the obvious choice for most people. So i would say top grade BDs big clean spotted and thousand island closely followed by Henlei with P14 last on the list. P14s are far more easy to come by nowadays thanks to numerous breeding projects and the fact they produce large litters will make them less desirable to collectors,without the BD influence they are the least striking of the black rays, because of this i expect the price to stoop rapidly with Leo's and Henlei taking top spot.