I personally would take the Dublin-New York connection. The only reason to go to Orlando is to go to Disney World. Maybe if you are realllly into Southern culture & are willing to drive 6+ hours to see relevant sights. Florida is very, very...... flat.
New York is within driving distance of so many cool places- Philadelphia, D.C., Boston, the Adirondacks......
Don't get me wrong, over four years I had a lot of beautiful times on the east coast of Florida (San Sebastian), visiting my ex's family. I love the beach, & the waves at Sebastian Inlet & would love to get back there one day.
That said, if I were a first time tourist, I would go north to New York. Especially considering that is is going to be summer-time when you visit. Florida in summer is humid & hot.
Basically, do you want a swimming/beach/sunscreen kind of holiday, or do you want a travel around, see local sights,water is cool but you can still swim kind of holiday? That will determine your destination, I reckon.

Follow Mothering