I just buy cheap generic catridges on Ebay for my Epson C60 (I usually can find them for 5/$10.. which is about an 85% savings!) They work just as well as the "genuine epson catridges" even on photo prints.
...besides if it ever screwed my printer up, i could just buy a new printer for the price of 2 epson cartridges (and it would also include 2 "genuine epson cartirdges" with it.. lol)
I know this doesn't apply to your exact printer, but I'm just trying to give you another viewpoint. The printer isn't worth that much money to worry about not using Dell cartridges, they want to charge you ~$30 per cartridge for god's sake!!