Using Tara queen... bought it before mco, before aerofoam moved to Klang. Bought for just RM1.8k (iirc) during their warehouse sale. Also had 4" super single.

Dont buy Rio unless you love soft bed hotel like feel. I think Rio is not suitable for long term sleep. Even with Tara, sometimes I get minor backpain especially when sleep for long hours like during mco.

Not sure. I also started to get uncomfortable with it 2 years ago and that's when I did my first flipover. Surprisingly the bottom was solid and I'm still using it. I think my next bed wont be latex as I'm nearing the age of having uncomfortable back whenever I woke up.

Actually I'm buying a mini tpe bed (50cm x 160cm) from taobao to try since I fall asleep a lot when watching tv. The hardness (not yet coconut bed level) is kinda ok for me when I tried lining up a couple of the tpe seat cushion on my sofa. It's also kinda airy which is a plus even with just fan.