Grad to know that that is a new Tempur flagship just opened @ Nassim 1, opposite Tanglin shopping centre. It was just next to my apartment.Is the memory foam you tried from the Tempur brand? Tempur got three levels of firmness. I got the most firm one. Also, the height and model determine the firmness. I tried all their models and heights until I found something I liked. It's the semi sinking feeling that wraps around the body contours that helped control my chronic pain (instead of spring mattress poking into my muscles and bones). Some furniture shops sell other memory foam mattress brands but I didn't like them. And I think if you use memory foam layer instead of memory foam mattress, the sinking feeling will not be as intense.
it was a totally Tempur experience. I have just bought 2 symphony pillows.