Pick a favorite airport and try one. 50% off sale going on right now (BOB is free). I was lucky that one of my favorite airports to visit, 6B6 in Stow, MA, and an airport I always wanted to fly into when I was flying 2B2 Plum Island, and another airport I've flown into many times, KACK, were all done by Bill Womack and are now released through Orbx. True, there's a lot of complaints from people I've seen, but I think the quality of their airports is number one, and I use them all the time and haven't had any problems, and I use it in combination with UTX. I'm not sure what the concerns are, other than some people have seen some interference with other scenery.
I only hope they do a few more around New England, KASH / KMHT would be awesome and is a gateway to the north and pretty interesting scenery around them (too bad Daniel Webster College is no longer a flight school), from city to lakes and mountains. Currier's Flying Service and Jack's Air Service on Moosehead Lake would be an excellent choice for some very underserved seaplane ports with interesting surroundings (cool railway bridge and local town with interesting buildings).