For brief opinions on several of your choices in the context of opinions on other liberal arts colleges, see reply #7: Struggling with D21's List. ED & ED2: Amherst, Hamilton, Wellesley, Vassar.
These analyses will help you compare economics departments:
https://ideas.repec.org/top/top.uslacecon.html
https://ideas.repec.org/top/top.usecondept.html
With respect to narrowing your choices, you are likely to prefer one of the Maine LACs over the other, so you may want to move on from one of the two. Regarding Dartmouth, while an excellent school when considered independently, it doesn’t seem to represent an especially compelling alternative in comparison to your current acceptances.