If you don't like to sleep hot then don't get anything memory foam. Memory foam captures the heat. Get Latex or the new Purple topper/mattress.
According to my infrared thermometer Latex is 40 degrees cooler than memory foam under your body plus Latex doesn't get hard in the winter.
We've just bought one of those new Purple pillows and it's even cooler than the latex. It's an engineered pillow with air channels to allow more cooling. It's just as heavy as a latex pillow, which means it doesn't move around.
