You crack me up. I was going to ride up to NYC last July for a conference but took my bike on Amtrak instead because of time constraints. I have the Adventure Cycling Atlantic Coast Route maps which have that route, but of course you would want to map your own, I mean of course.
You could really craft a nice route going up through Bucks County, over to Jersey at New Hope and Lambertville, up through Princeton and then into my old stomping grounds. Used to live in Metuchen NJ.
Gets a little interesting as you head north of there, but you're a fan of urban riding. The Ac maps take you into Newark where you take the Path train in. I would say ride all the way to Jersey City, great skyline view (used to live there too, pre 9/11)Take the Path from there, still $1.00 I think and they allow bikes no problem. Alternately you could ride up to the GW bridge which I believe has a bike lane and stunning views. Of course once in NY you would want to circumnavigate the island, ride through Times Square, and of course do loops in Central Park, which I did last July, great fun, and hilly.

Here's an idea-Ride up for the Five Borough Bike Tour in early May, did this tour a couple times, once with my son. It's a huge ride and can be frustrating when you bottleneck through the boroughs, but a thrill to see Ny taken over by thousands of cyclists. You get to ride through CP, over the Verazano Bridge and then take the Staten Island Ferry back to Manhattan. More info than you need-but I would be into it.
http://www.bikenewyork.org/rides/fbbt/index.html

I did ten easy miles today to test out my back, over on Bellemore,etc. Hardest part was swinging my leg over the bike. Helps you concentrate on using the legs and not the BACK! Serious flipping pain!

Tomorrow I will be doing a coffee run ride with a small group that I began riding with back in the fall, very easy pace. We meander down through Hampden, Druid Hill, down to the fort then over to Fells Pt for coffee. A good easy workout as I will be in low resistance. GB-We roll down through Hampden at around 8-8:30 (time adjusted after moving forward) so call if you want to do a slow ride, though sometimes they get frisky. I may extend the ride and go north a bit on the return if I have time and my back doesn't freeze up.
I think you have my cell#.