What size would be good for the marmot...
What size would be good for the marmot limelight 2p tent (body, footprint, fly)? The packed dimensions of the tent is 7x21, so minus the poles I dont know what size compression sack to use.
Large might seem the logical choice because of the volume comparison to the 7x21", but go with a Medium. You still won't have to fight to stuff it every morning on the trail, and it'll go in easily and honk down to as small as you're going to get it.
I use a small actually for my Big Agnes 3 person. I usually don't have the footprint though, because someone else carries it to share weight.