If you haven't seen it already you'd be well served to try to catch the monday screening of Boy A. I've heard some describe it as their favorite of the festival. I still think I'd put Edge of Heaven above it, but Boy A is still pretty darn good.
Less good is Transsiberian. It's one of the better movies I saw today - but the bar on that is fairly low. I think I'm going to have to institute a Woody Harrelson rule for future festival choices - meaning be very, very wary of anything he's in.
Finally - on a helpful note be sure to checkout this recent post from fellow SIFF blogger The Voice of Reason on Film. She's seen a bunch of stuff playing at SIFF this year and has some quick yes/no votes for your benefit. If only I'd read this post earlier in the day I could have made some better choices. Ah well - the highs and lows of random choices is part of the festival fun... :-)