I have a latex mattress. We went with that because they DON'T sleep hot the way memory foam ones do. That is because latex responds to pressure whereas memory foam responds to body heat.
We like ours a lot. They are customizable with layers of different firmness that you assemble for your own desired sleep situation. The only negatives are that they are heavy and also, require a platform-type bed. DH was able to modify our existing bed by adding slats to support the mattress's weight. However, your current bed frame may not accomodate or be able to be modified to accept a latex mattress adding to their already fairly high cost.
On the plus side, they last "forever". Regular mattresses should be replaced? not sure, but definitely more often than latex.