About 3 years ago I was in the market for a new mattress as the one in the condo I was in at the time was typical of here, very firm, even with a topper. I prefer what is called in Australia "medium" softness, so you don't sink into it, but its not like a futon either. I tried a number of places and still wasn't impressed with their offerings. Now if I recall correctly it may have been HomePro also, at least it was on Sukumvit and wasn't a bedding only store, and when trying out the mattresses and telling the salesman my thoughts he said to me sir, I know what you need - a memory foam mattress, tell me your address and I'll bring you one - note this was nothing to do with the store, I'm assuming it was his sideline business. It was a bit of a gamble of course but he didn't want any money at that point. A few hours later he arrived with a pickup truck (ute in Oz) with a brand new mattress on the back still in its plastic wrapping and 2-3 men, put in on the ground for me to try, yes I thought, this is my mattress. They moved it up to the room and total cost including delivery 20,000 baht. I've just looked at the brand name on it, its called a "Bonfire pocket spring memory". Very comfortable, we don't use a topper and the only time we have had similarly comfortable mattresses are in higher end hotels, and yes I would rate the softness as medium. I'm no longer in a condo but brought the mattress with me its so good. Good luck, maybe if they don't have what you are looking for have a quiet word to the salesman if he can do something similar.