I've got 200 leftover from a paycheck, just got some shoes, I'm looking clipless pedals, and I'm indecisive. I was at some shops recently (Bunnyhop, Richmond and Orange20, CA) and they had conflicting suggestions. One for spd's, one for atacs, my brother rides eggbeaters on his fixed, and I like speedplays product gimmicks/design. What do you think?

I've only used spd's on a road bike so I have no prior knowledge of other clipless systems. How is engagement and disengagement on the other pedals? Any accidently disengagement? How wide/narrow do they put your stance on the pedals? How are the quality of them et cetera?