What software is best? I want to set up a blog with the following qualities. 

1. The blog must be hosted through my existing domain and under my full control.
2. The blog must be editable either online (my
hosting supports Perl, PHP and MySQL) or through Mac OS 9--9 not X!
3. The blog must be highly configurable, particularly as concerns templates.
4. The software must be free or cheap, and not put my content under
any copyright restrictions or impairments.
5. The software must be easy to install and stable; I can write PHP
and Perl at need, but I am not a Unix hacker.

I would prefer if the blog could use HTML entries at least by request,
rather than requiring some special mark-up language.

I'm pricing this low because I'm sure someone has the answer right on
their fingertips. I would be happy getting a short list of options,
but, for now, I know too little to start looking intelligently.

Thanks!