Hi Vik,
The first place to start your research is post #1 here which has all the basic information, steps, and guidelines that can help you make the best possible choices … and of course know how to avoid the worst ones.
I would be very cautious about using reviews to replace actual research. You can read more about mattress reviews in post #13 here and a forum search on Dynasty (you can just click this) will bring up more information about them as well.
You can read more about the many factors that can affect sleeping temperature just as much as the type of foam in the mattress in post #2 here
Once you are at step 3 … then post #29 here has some of the better options and possibilities I’m aware of in the Buffalo, NY area.
Phoenix