Jim, I went through this two years ago when our old Samsung committed suicide during a storm.
I wanted a 12v TV with a DVD built in so there wouldn't be the additional complexity of an inverter and external DVD player.
I figured a 20" would fit nicely above our table when it was folded up. That meant a mounting bracket that would tilt slightly downward. 720p would be fine. At that size it's difficult to see the difference between 720 and 1080.
I looked at every brand of TV in the retail stores. Most have voltages printed on the label of the "brick". Every one was 19v. There may have been 12v models at one time but they don't seem to exist now.
TV prices at marine retailers are outrageous even allowing for the 100% markup required to cover the cost of printing "marine" on the box.
I hit the truck stop in Bordentown
(not too far from you). TVs sold to truckers have to stand up to a lot more vibration and abuse than they do on our boats. My TV is branded SuperSonic but it's identical to several other brands I found in other truck stops and camping stores. I mounted it with a store brand mount from Best Buy using stainless bolts, through bolted through the bulkhead with fender washers and nylock nuts so they won't come loose. Power is tapped from the bulkhead light and the coax is run up the wall in the head.
For an antenna forget about anything in the boat. On Forked River the only station you'll get with one of those is Telemundo.
Installing a dockside connection will bring in cable at the dock (the Marinco cable/phone jack
is half the price of the cable only jack). Check with Dave, I'm almost positive Silver Cloud has Comcast.
To get programming away from the dock either get a mast mounted antenna/amplifier from Shakespeare (I'm installing one now) or up your data plan so you can stream via your phone or tablet to the TV. Silver Cloud's WiFi is spotty and not up to streaming.
And it's obligatory that you buy a Captain Ron DVD and that it's the first thing you watch when you install your new TV
So far she's held up well and the TV has a great picture. Hope all that helps.