The JWK tournament is great, really good competition, but they also have several divisions now and do a better job of making sure teams are in the right division. If you want to play the best competition, I would recommend this.
http://jwkhockey.com/
Check out the Warriors tournaments too, they are usually good.
http://www.jrwarriors.com/content.php?sect=33&catid=275&navid=33
Personally, I'm not a big fan of the tournaments at NES. The complex is nice, but they are not known for running great tournaments. I always get the feeling from them that they want people in and out and games to just end on time so they can make as much money as possible. There also always seems to be 1 team in every tournament that clearly does not belong there. IMO, making sure the competition is always good/competitive is a huge part of running a tournament and I think they lack there.
There are a ton others in the area and a bunch more if you get closer to NH.
If you end up in the area and want to pick up an extra game or two while in the area, let me know. I don't coach at that level, but know some who do who are always looking for more games/new opponents.