It looks like the RX500 is a considerably higher specification model which includes film scanning capabilities.
I'm happy with my Epson Stylus C80 and Epson Perfection Scanner, but I don't much colour printing, and don't need the highest photo quality. Epson pigmented inks have the benefit of being light-fast.
Always good to check out running costs and availablity of compatible cartridges if you intend to do a lot of printing. Choice Stationery seem to be a popular choice for cheap ink.