7. Although throughout the year it is proper to minimize one's use of fine
utensils ("kelim na'im") in recognition of the loss of our Beit Hamikdash
(1), on Pesach, however, it is preferable [to set the table] with as many
fine utensils as possible. Even attractive utensils that are not necessary
for the meal itself should be placed on the table for the sake of beauty,
as a symbol of freedom (2).
(1) See Rambam, Yad, Hilchos Ta'aniyos 5:12
(2) As we saw in HY 118:1, it is a mitzvah on the night of Pesach to act
and feel as if you, yourself, were just freed from slavery in Egypt.