I'm very familiar with Dogfishhead's series of 60/75/90/120 minute IPA's, Harpoon's Leviathan, and have recently found new favorites in Sixpoint Hi-Res and Resin.
What are some similar high-ABV Double/Imperial IPA's in this area?
I think that list will do for now. Again, It'd be best to rephrase your question as I was not sure if you meant beer brewed in the Northeast or beer available there. I went with the former (since it should satisfy both conditions anyway).
What you want to keep an eye out for are so called Imperial IPA's; it is a category of high ABV IPA's