Go to Montreal, I know it's not in the US, but they have a pretty cool culture that is unlike anywhere else in North America. You don't need to speak french there, and I think you would enjoy it. You could also drive to Vermont from there so you could knock a state off your list.
There is a whole separate list for outside the US! I must see my FL friend who moved there for a job, I must have some mutual bleeding with Keeks, I must sleep oustide your window, and my sister wants to go to the Shakespeare festival in Montreal one year.
There's no cities in CT worth seeing, unless it's just to visit Mark Twain's house.
Atlanta is on my list mother-fucker, get your liver prepped.