the seahorse one i saw is about $500
I tink it all depend on individual. Some ppl prefer firm and hard
some prefer softer feel. So to buy mattress muz lie on top to feell
it. For ladies please wear trousers on day of testing else wait
show light 
For me I got Dunlopillo. I tink King Koil, Simmons, Sealy are all
good brands but their price super expensive too! No advice given
just to say muz lie on top test sleep to determine. Cannot choose
mattress juz based on specifications only.