Rebirth of a Nation

I am at BIGLAW in New York with a few years under my belt and considering moving back to TO in a year or two. I realize it will be a huge paycut but hey, I'm sick of paying close to $5000/month rent and I miss Toronto!

My questions are: (1) which firms makeup the "seven sisters"? (I think that's what they are called) and (2) Which are the best IP boutiques?

Thanks for any info...