Flying Fish has a great Belgian Dubbel and a series inspired by the NJ Turnpike ("Exit 4" is great). River Horse is nice. Unfortunately previous NJ laws restricted brewery and microbrew pubs within the state resulting in less local breweries compared to states like PA. However buying beer at liquor stores in NJ is superior to PA.
Other great 'local' breweries outside of NJ include Weyerbacher (Easton, PA), Dogfish Head (Milton, DE) and Southern Teir (Lakewood, NY); if you haven't tried these 3 breweries, I'd highly recommend picking up a few, particularly if you're in a mix-and-match liquor store.