Austin, not to be harsh but you're being unreasonable.
What you want is an idealized world where everything works all the time, perfectly, weighs nothing, and fits into a pill. This simply doesn't exist. There is no free lunch and you will have to make compromises somewhere.
All of your options that you are looking at are bulky (comes with cold weather gear) and a 30L bag simply won't cut it. Even the most bare-bones winter enthusiasts have a hard time at that size pack because winter gear just takes up more space.
The exped downmat 9 is rated to -38F and weighs a ton. Why do you need/want that? Sure R-8 sounds/is impressive but an RV will be plenty warm too.
Again, I'm critical. This is a forum geared towards Backpacking LIGHT. You seem more interested into traditional backpacking methods or are rather inexperienced in the backcountry. If the former, there is a lot you can learn from this site if you're willing to listen. If the latter, then you should consider gaining more experience during milder weather before tackling sub-freezing weather. Hypothermia is not only miserable and potentially fatal, it's also very likely to happen to someone who doesn't know how to stay warm. Simply wanting a synthetic won't keep you comfortable, you'll still freeze if it gets soaking wet and isn't taken care of, you just won't die, maybe.
These forums have a lot of information that you can learn from, but the first thing you have to understand is that there is no one silver bullet solution to any problem, much less the worst case scenario of backpacking which is "cold and wet"