Who's buying the Collector's Edition and why or why not?
I'm getting it for the map and art book. I think the pets are a joke. They don't fight for you so I see them as no different than the other non-combat pets already in the game. The least they could do is provide extra storage for you. And yes, I have no problem with people who buy the the CE having an advantage in the game. They did spend more money.
But the other extras are enough to make up for the disappointing pets. I just wish they had included a DVD with all of their cut scenes on it. Blizzard's cut scene animations are second to none.