The best cook system for the money right now IMO is MSR Pocket Rocket w/ a Olicamp XTS pot, 1m25s boil time for 2 cups at 11,000ft.
If you want a 20" long pad I can give you a good deal on a Big Agnes Q-Core. Otherwise an insulated static V will work fine.
The sanctuary jacket is very heavy, but is super warm and nice if you don't mind packing it around. I wore it in a blizzard last year in 3rd season and could sit still for a couple hours before I had to move because my feet were too cold. Don't plan on wearing it when moving around unless you are moving very slowly. I had my binos zipped inside and they were very fogged up because it was so steamy and warm, so just a warning to take your binos out of the harness before putting it on. I can't speak to the Sitka, mainly because I don't even try Sitka due to their short cut. The First Lite is very large, so plan on ordering down.