Latex is same function as memory foam..just latex is cooler than memory foam, i mean pure latex. Its expensive also and firmer,some mattress using latex as toppers.

I have tested DUNLOPHILLO pocketed spring with latex toppers, i feel its hard for my body, maybe its suit for 80kg above.

I tested NAPURE SOHO, full latex and toppers with coolmax technology where feel cool when lie on it... but nearly RM3200.

If u prefer latex you can go for NATURATEX, nice feeling around 1800k i guess tested at Oldklangroad furniture.
Latex and memory foam is anti dustmite, because of the chemical inside, even the memory foam density is different for certain mattress, some u feel soft and hard, because of the density level...
comfort zone can be any toppers like memory foam/latex/pillow top and extra... the below layer if its nonspring its using high density foam, which is polyurethane foam very hard,meant to support body weight and also the durability is higher.. dont think non pocketspring mattress the whole mattress is memory foam or latex... if it is freaking expensive...

The memoryfoam i stated is not 100% memory foam, i have tested 100% memory foam top to bottom, around RM23,000.... i lie straight on it get sink base on my body pressure, i really struggled to turn right and left... i kneed on mattress i get sink too, terrible.. thts what meant for astronauts

Kingkoil memoryfoam toppers and impress memoryfoam toppers both different density,kingkoil softer than impress...

Another thing u must take consider, all mattress after 1 or 2 month usage become bit softer because 10% of the wind come out of mattress, i personally found it...I tested Regatta mattress at puchong found harder..i tested at subang its softer.... its because of our body impression and some think its already sagging and wanted to claim warranty and companies rejects that...

i have tested silentnight extreme firm series, which felt comfortable.. medium firm.. the lady told me its already out of 10% wind...when first arrived felt like sleeping on hard rock surface coconut series.

So think wise before you choose, choose base on ur body size.. if simply choose than waste of money... so i believe u already have knowledge now. 

Maharaja kingsize company price RM2220, get ur cheapest price and bargain at below address, maybe can go 100 lesser than ur finding.
maybe can get 1300 or 1400..

Puchong Utama AVENUE, WESTHOME DESIGN
Manager Rahman 0123222907 / Musa 0169648682

survey at bandar puchong furniture shops...

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Added on March 20, 2011, 11:11 am
FEIZAI..

BRO Most of the mattress shops r in aircon, so you test any kind of materials also feel cool.. so hard to determine
Never buy based on your test on mattress that covered with plastic,go for those barely open easy to feel.even my room non aircon, so i wont know mattress im looking for suits or not.. based on the top materials..i heard if its damask, more warm.. so now manufacturer replacing to something else..natural latex cooler than synthetic..

Bro.. Getting cool bed sheets also good idea, if its soft and breathable you have good cool sleep...
100% cotton more soft and breathable..if buying bed sheets must look for higher TC(threadcount)..
The higher TC cost more money and softness+durablity+smoothness increase as well..
Go for atleast 250-300 TC or above if you afford..
Some blend fabrics like cottonpolyster is cheaper,its less wrinkle and polyster warmer/nonbreathable...
Imagine your bedsheet full polyster,your sleep is nightmare..

Natural fabrics are cotton/silk/linen/wool
Synthetic fabrics are nylon/polyster
Egyptians /supima/pima are well known cottons...

Another thing, make sure measure your mattress well before getting bed sheets... length width depth

standard bedsheet measurement for queen size 5ft mattress  is
60" (width) x 80" (length) x 21" (depth/drop)
152cm x 203cm x 53cm

so if ur Queen size mattress is  152cm x 190cm x depth (must measure with ur toppers) definitely will fit the standard queen size of bed sheet.. the drops long enough to fold underneath of mattress.Impress and Spinalguard depth is 10-13inch only.

You can try silentnight mattress all series at factory showroom at this address
Masterfoam industries
Lot196, Jalan TUDM KG BARU SUBANG, SHAHALAM
TEL 60378473288

Kingkoil Spinal Guard, i tried at Furniture shop Casebella Italia at PJ, next to JAYA ONE building, infront traffic light
Expensive there, when i checked it was 2300, after that week increased i heard.
Boleh la bro testing purpose can go there, hehehe