Danbury is smaller of course, but very personable and nicely done. There are a fair number of exhibitors and it's comfortably attended so you see a lot of friends and personalities but you also have enough time to chat.
Marlboro is very commercial, which has it's ups and downs. Depends on what you're after. Somerset is the mother of all shows this side of the Mississipi.
My favorite in this region is the March show at the Shriners.
I hope to make the drive, I'll be out casting in the parking lot most likely