I bought D5, but like another user mentioned, I chose them over the D3 (and even the copper) only because I preferred the look, and it wasn’t a financial hardship for me to do so. I would have been totally happy with D3 if I liked the shiny finish or if that was better for my budget.
And the D5 are quite heavy, as others have warned. I have to use both hands to lift unless they are empty, and I ladle instead of pour a lot of the time, now.