More so my list of favs than best, but quality obviously plays a part, so it's a combo of for me enjoyable/quality:
Broadway:
1. Dirty Rotten Scoundrels
2. Pillowman
3. Light in the Piazza
4. Chita Rivera: Dancer's Life
5. Spelling Bee
Other-non bway favs in no particular order:
Ragtime at Papermill
Finian's Rainbow at Westport
Forbidden Bway: SVU
Newsical
Dog Sees God
"If there was a Mount Rushmore for Broadway scores, "West Side Story" would be front and center. It snaps, it crackles it pops! It surges with a roar, its energy and sheer life undiminished by the years" - NYPost reviewer Elisabeth Vincentelli