I really enjoy whichever Stars album my girlfriend has in her car. Other than that I haven't listened to anything by them. *edit* The album is 'Set Yourself on Fire'.
It's kind of a running joke I have with a few people that Metric plays every Canadian festival they possibly can. I think just in this past year they played both Squamish and Sonic Boom (their 2nd time at that festival), and previously they were at Pemberton, Lilith Fair, Ottawa Bluesfest, Osheaga, Edgefest and virtually any festival happening in Montreal or Toronto.
You're right though, I don't think they've ever done Sasquatch. If they get their new record out early enough in the year I could easily see them there in 2012.