There's a thread about this subject up on http://www.tribe.net . Go check out the Bloggers tribe and look for the 'Blog help please' thread. Looks like the guy went with Movabletype.

High level:

If you've got a technical bent and/or control issues, I'd recommend Movabletype (free).

If you just wanna get started and don't want to muck with templates, I'd recommend Typepad ($$$).