After reading up on this forum, we went ahead with an all latex Ikea king sized mattress.  It's very firm, just like what we wanted.  Now we are trying to figure out what the best topper would be for it.  We went with the very firm mattress for base support and the topper is just to make the mattress more comfy - not a support issue or anything like that.  Hope that makes sense!

Any topper suggestions?  We don't want anything that will sleep warm.  And we love the support of the case.  Just want something to hug our bodies a little as our mattress right now is very firm.

 

Thanks!