Blog suggestions

Ok I’ve found loads and loads of scripts for weblogs but I want to make sure I pickt he right one and I thought I could ask you lot for advice.

what I want to do is insert a weblog into my exosting XHTML [age and style it so that it fits in with the res of the page, preferably through CSS. I would prefer the blog to be PHP as I have more experience with that and I do have MySQL databases that I can use. The only other thing is I would like a few users to have access to inputing content into the blog?