There are a great deal of large
40k events on the east coast, it's a great location to be in. Unfortunately a fair amount of them happen in the late summer / fall so you may have to wait a bit for them.
-
NOVA Open is the biggest east coast event, it happens in late August right next to Washington
DC. It's a full convention with vendors, seminars, and various other games being played.
http://www.novaopen.com/ Many of the other east coast
GT's use
NOVA's mission format.
-The next
GT in the east that I can think of is the Delawwarr Open in Newark,
DE. It's the first year for the event and it will be in April.
http://delawarropen.com/. It's a
NOVA style tournament (I'll get to that in a sec).
-Killadelphia is in June, just outside of Philadelphia,
PA.
http://www.killadelphiaopen.com/. Last year was their first
GT and it was an outstanding time. They had it at VFW so there was cheap beer on site which was excellent. Also is a
NOVA style tournament.
-ConnetiCon is in July I believe and has a
40k GT. Pretty close to you in Hartford
CT http://connecticon.org/
-Battle for Salvation is in October in Palisades NY. It's a
40k only event but has a great showing every-year.
http://www.battleforsalvation.com/ (their website probably won't be updated for 2014 for a while yet I'd guess). Also a
NOVA format tournament.
-11th Company
GT is in November, also a
40k only event run by the 11th Company Podcast in Myrtle Beach,
SC. Also a
NOVA format tournament.
-Da Boyz is also in November, a lot closer to you in Canandaigua, NY
http://daboyzgt.com/
-Templecon is probably the closest event to you, but it just happened a few weeks ago. The
40k GT is just part of a larger con there so they have other game systems being played as well as a more general scifi convention. It's in Warwick RI
http://www.templecon.org/14/
I may have missed one or two, but that's the big ones I can think of. If you keep an eye on the tournament discussions page though you'll often find
RTT's with a more competitive crowd if that's what you're looking for. Out of the range of areas you listed, you'll namely be interested Templecon which won't happen again until next February, or ConnetiCon in July.