I like your logo Matt apart from the MW join.
At first glance it seems like it would indicate something relevant to the subject like a Forex graph or something but then you kinda realise it doesn't and the designer just joined them cos they could.
They should have made the W a reflection of the M then that would have made sense.
How will you split test the logo for user engagement? How would you be sure it wasn't your latest content on the blog that wasn't affecting user engagement? Unless you didn't post new content for a while and simply rotated the logos I suppose but still you couldn't be sure it was fair as the one that goes last may see more links indexed etc.
P.S. The logo facing left has a much clearer and easier to read tagline
Good luck with your blog mate.