[quote name='unopepito06']Both my BBs have AC: Brotherhood in stock (unknown whether it's on clearance). I might have to bite on that, I've never played any of the "Assassins" games, but I've wanted to. What kinds of goodies come in the CE?[/QUOTE]
According to Amazon:
Doctor Jack-in-the-Box Collectible: Call on the practitioner of death and his poisonous syringe.
Two Exclusive In-Game Single Player Maps: Extend your game as the legendary Master Assassin, Ezio, and explore the undiscovered depths of Rome.
Hard Copy Strategy Map of Rome: Discover the hidden secrets of Rome only this map will help you find.
Exclusive Art Book: A compilation of never-before-seen concept art drawn and designed by key members of the development team.
Bonus Disc Includes: Exclusive Making-Of Assassin’s Creed Brotherhood Video, Digital Sneak Peak at the Assassin’s Creed Comic, Trailers and Developer Diary, Game Soundtrack by Jesper Kyd
Not sure if any of those are Amazon exclusive, so don't be surprised if the BB version switched something up.
Since you've never played a game in the series, I'd suggest playing Assassin's Creed 2 first. Brotherhood is its direct sequel and spoils 2's ending in the first few minutes, so if you ever want to go back, you'll already know what happens. Also, AC2 felt like the overall better game. It left me wanting more in terms of gameplay and story (which is why I took the time to platinum it), whereas Brotherhood only left me wondering what happened immediately after the ending. So if some random guy on the internet's opinion means anything to you, pick up AC2 first.