Seconded.
Everyone has their favorite spot for gear guides, and having one built "for speed" will remain relevant long after the current BIS slots are ground into dust by the next content cycle

That being said, I know I confuse any number of classifications as I jump from toon priority to toon priority. I'll never have a "class" following like many of the blogs I read and enjoy because I change my class (and articles on different classes) often enough that people never know what I'm going to be discussing tomorrow.
I think, at least on class oriented guides, consistency is better for building a regular readership (although google doesn't care about that, so you'll still gets hits ^^)