RE: Lightest - rests, sights, quiver?
For a light-simple-high quality quiver look no-further than the Kwikee 3-Arrow. For rests I would recommend Trophy Taker. Simple, clean, reliable. For sights, I wouldn't worry about weight. They are all pretty comparible. I use a Vital Bow Gear sight as I like an adjustable single vertical pin sight, that is crazy bright!