Stroller jungle!

I'm a ftm trying to navigate through the jungle of strollers. I've been looking at the Uppababy Cruz and Vista and the Nuna Mixx 2, but can't decide! I'm open to other suggestions as well. I want a bassinet for the stroller, but not sure if I'll need a car seat since I already have the Doona. What do you think? And advice is much appreciated!