Best PDF library

I will be generating PDFs. Which library is the most good?

I have examined so far:

http://www.lowagie.com/iText/
http://libharu.sourceforge.net/

What do you think?

Guys, leave >>18 alone/ignore him.  It's pretty obvous that he's kind of slow, comparing typesetting to text editing, and what.  Failing to notice that KPDF has search built into it.  Not realizing that someone editing the contract you send them can fuck you over royally.  Or that allowing someone to change what you've written could allow them to even steal work you've done (this is an important issue in the academic world).  For not noticing that, while he has the file, he doesn't actually own it because text is the sole property of the one who wrote it.  Give the dumbass a break.  This is America- we even let dumbshits like him graduate high school.