One series Ive been wanting to dive into for quite some time is the Assassin's Creed series. Its always been intriguing to me since I saw the commercials way back yonder. At that time, I do believe it was a PS exclusive. Now, I've noticed recently its been available on all platforms for some time. I just saw AC II and AC Brotherhood(?) in the cheapy bin at one of my local retailers and thought about grabbing one or both.
Question is, which game would be the best game for someone like me to just jump into the storyline? Should I try to find the original on 360 and go from there or are one of the games listed above a good start?