150 all day but it really depends what specialty malts you're using. If you're using all base malts you can get away with mashing slightly higher, say 152, but if you have crystal malts in the mash I have found, since they're unfermentable, you can mash lower and still get some sweetness.
Since NE IPA, to my knowledge anyway, isn't an official bjcp style yet the door is wide open for your own interpretation on the style. I dig WC IPAs but I like the punch of hop flavor NE IPAs have. I think my perfect IPA is mostly dry with clean yeast character, about 60-70 IBUs, and lots of hops flavor without the fruit juice aspect and the soft mouth feel.