Thanks to some great input from other Whiteblaze 'husky boys', I decided to go with the Sawtooth extra wide. I was a bit concerned about taking a down bag on a thru hike but I figure if I'm smart* I should be able to keep it out of downpours and/or rivers -- and the water resistant shell should shed any thing else.
Feel free to support or mock my decision, either way thanks for the great info!
* I give it three days before I get drunk and try to raft on it