The new list of possibilities are:
Emerald Isle Cardigan (linked in post below)
I ruled out Ms. Darcy, because it has a decent amount of seaming and finishing, and I'm looking for quick and easy on this one.
I ruled out the Garter Yoke Cardigan, because I don't feel confident that I could finish in time. Finally, I ruled out Lush and Lacy, because I'm not sure that it will look good on me, after looking at several Ravelry FOs.
I'm leaning towards the Favorite Cardigan in Malabrigo Marine
or the Emerald Isle Cardigan in Wool of the Andes Onyx Heather