I'm preparing for the Cascade winter and am looking for a larger mid for 2 peeps, a large dog and our gear in the wet snow. Thinking about the supermid, luna 4, mega light, etc. I'm a little on the fence about shangrila 3 - not sure if it will be big enough, and the 5 seems a bit big. Looking for <28 oz if possible.

I would love something with a generous vent and the ability to open a slit in the door- either a 2 way zipper or snaps or something. Let me know what you have and what you want for it. Thanks!