My company wrote a good sitelet for a pretty large company using
pdflib.
We started this project back over 2 1/2 years ago so the pdf options in Perl were few and far between so we stuck with it. I think there's more information on perl.com and cpan.org ...
Search cpan.org here.
Back when we started using pdflib it was free, well it's not anymore and that's why we haven't upgraded. If the client would want more capability or just want upgrade in the future, I'll probably be in the same boat you are, but as for now pdflib did the job for us for free.
Good luck with your search.