I'd call the airlines a fews days before and see what they say.
In times of increased security it can change frequently.
I am a consultant and travel (thankfully mostly by car) and the corporate travel departments lately have been all over the place. One client was sticking with 1 hour, some with 2 hours, and one even going with 3 and reporting that doesnt always work- all are fortune 500's in NJ.
Also as an aside- for newark- go to the port authority website after you talk to your airline. Frequently they tell you to add 30 or 60 mins to 'whatever advice the airlines give'. I believe that is mostly due to the havoc up there due to construction. If your not traveling for a few weeks- actually some of the construction is nearing completion up there (parts of both new parking garages and the monorail extension/ NEC rail staion were all set to open this fall).