As my subject line says "Any agreement on what is best source of empty Canon carts?" I am not in a position to buy a full set of Canon BCI-6 OEM full ink tanks; but having done some much switching around think it may be a good idea to start fresh with a set that is all filled with the same brand of ink (MIS). I would appreciate some feedback on this. And if I turn up needing new printer, what models still use this cartridge?