Reddit reviews Les Fleurs Du Mal

If you have not yet read it you might enjoy Will Self's Dorian, which updates the story to the era of pre-cocktail HIV/AIDS.

If it is fin de siecle libertinage that attracts you then you might be interested in the Decadent Movement. My personal favorite work is Baudelaire's Fleurs du Mal which is just dripping with sickly sweet amorality, but it is Huysman's Against Nature that is considered the manifesto work.

Poetry: Richard Howard translated The Flowers of Evil. The original text follows the English. It's a good thing, too, because Richard Howard once translated "les affaires hexagonales" as "hexagonal affairs".

In addition, you can read the poems at this website.

As for Rimbaud, here's Wallace Fowlie's bilingual edition of his poetry. Unfortunately, it sets the English beside the French. That said, it collects much of what Rimbaud wrote. It isn't bad.