I go back to CT a lot and take I-80. It's a reliable 5 hrs from South Hills to Delaware Water Gap. From there it's a crapshoot dependent on NJ/NY traffic. I normally take I-287 to go over the Tappan Zee (I guess it's now the Cuomo) and if you want to do that, there's an exit for the Saw Mill Pkwy which can get you to Yonkers the back way, avoiding the GWB.

There are long stretches of I-80 where you can comfortably do 80 mph and most other traffic is 75+. Rarely see cops west of Bloomsburg. Once you're past Bloomsburg traffic will slow somewhat and might crawl when you get close to NJ border, but I generally find it faster than I-76 to I-81, and certainly much less expensive.