B&W, looks nicer to me. Sepia has its place, but I don't see to many that are used in a manner that is not abstract. Like a photo that has been manipulated with elements of sepia, b&w and color.
The thread was two months old before being bumped. I may be missing something (I usually do) but surely the choice between these two photos has been made by now?
I prefer the BW one, it looks more precise, less blurred. The detail on the side logo and rear ear piece are crisper. There are a few specks of white and a small scuff on the top of the head band I'd try and get rid of those. Gah! necro photo bump, yik.