Welcome to the Buk boards!
Since you've read Factotum, Post Office, and Women, I'd guess Ham on Rye is your next mark.
I just finished Most Beautiful Woman in Town, so that's a good one, too.
For poetry? Well, since you already read Women, you might try Love is a Dog From Hell. That's sort of a poetic companion to Women. But you really can't go wrong with any Buk poetry book.
Oh, and since you're new, you might try and introduce yourself in the new blood section. That's the best way to attract the most flies with your honey.