That's entirely up to you. But I bought a memory foam mattress for about that much in 1998, and it was the best money I ever spent. The back soreness I had on a daily basis for years was gone for good after a few months.

The thing is absolutely dead to vibration. On a solid foundation, your partner could be doing jumping jacks on her half and you'd sleep right through it.

Furthermore, after 10 years of sleeping on it, there is absolutely no sag, or even the slightest bit of softness in the middle, as there has been in every conventional mattress I've owned in fairly short order.

How much is a good night's sleep worth? How much is the quality of your life worth? What the hell else have you got to spend $1500 on that's more valuable?