instead of classy, maybe you could use 'timeless'
Depending on how the words are used in the poem, some of these may be of use.
Alternatives for classy:
stylish, dashing, elegant, exclusive, fashionable, superior, swank, swanky
Alternatives for fresh:
new, crisp, current, different, gleaming, glistening, latest, modern, modernistic, natural, original, radical, raw, recent, sparkling,
Tip: Just search through a thesaurus for synonyms of the words.
When you are looking for a synonym, if a good dictionary doesn't have some, try a synonym dictionary and/or a thesaurus.