ProBlogger more than John Chow, I think John Chow just posts rants and crap. PB on the other hand has quite a bit of insightful and interesting posts.
totally agree johnchow got nothing to read about. all his post feels like a paid reviews. problogger talks about bloging a lot, but i don't read his blog since he seems to talk about things that we already know and feels like a waste of time.
I read johnchow.com blogg, I don't read problogger, I will start reading it too! I also recommend hamletbatista.com