I've decided to go with Butterick 7049, here's my first muslin:
I've got a lot of bagginess at the top on both the front and on the back that needs to be addressed. I also think that the front darts are a bit weird, I think they might need to be positioned a little bit lower. They probably also need to be double pointed darts.
More photos/details on my blog: handmadebyfreya