I think I have said it once before, but I swear I'll end up saying each and every raiding tier: I do not like gear guides, especially best in slot lists. While it is good to have a list of gear that you want and a goal to reach for, aside from Graylo's posts back in Wrath, I have never seen an actual list that is realistic. Yes, it's nice to know what you'll want to have once you've been farming a zone for months, but when you're just starting out, you take what upgrades you can get. Period.
More so now with reforging, getting new gear is a huge PITA, and I've yet to see a gear guide that could actually help a player address those issues. I wouldn't ever expect it to; it's unreasonable to make a contengency plan for every single gearing combination possible. Plus, half the slots are always Get the only pair of X that drops in this raid or Get the tier gear. Duh.
What I do like, however, is information on gearing. Gearing can be tricky, and it's nice to know some of the ropes so that you can make informed gearing choices. With that in mind, let's talk about gearing.