C.B.
Sounds like you might be interested in warmer weather but NYC is wonderful in the fall. The days are still comfortable and there is so much to see and do. My husband and I go every fall and see shows, have nice dinners and basically wander around. We have done the Galveston cruises but if you want my honest opinion they are sort of disappointing if you have ever cruised before. The ships are older and in general the service and ammenities are just OK, not stellar like some of the other cruises we have taken.
They are not bad but for a little bit more $$ you could take a nicer cruise on a newer ship and travel to better places.
I just thought of one more thing Puerto Rico is very nice also, no passport required. They have lots of nice beaches, nightlife, outdoor activities, and the climate is always wonderful. I know you said no CA, but Napa is still one of my favorite spots for relaxing, so many great spas.
Good luck deciding and have a great vacation and anniversary!!!