Hi Sepia,
The better choices I’m aware of in the NYC area are listed in post #2 here and a more categorized list with more detailed descriptions or many of them are in post #4 here.
Neither Original mattress or Denver mattress are close to NYC and shipping costs would likely be prohibitive so I would focus either on local choices (particularly the last group of 5 on the NJ list, 3 of which are close to you) or on better manufacturers that specialize in working with customers online or on the phone (and some of the best in the country of this type and that are recommended members here are listed in post #21 here).
Phoenix