I don't think we can afford either, really, but I've been reeeeally wanting a bob double stroller lately. Lo2 is a chunk and getting heavy to wear, and lo1 doesn't love the stroller, but struggles to stay motivated on long walks. I've been stalking classifieds looking for one lately.
But I also think a bike trailer would be awesome. Again, would have to find it used.
If you were going to get one or the other, what would you choose?