I too have severe arthritis and my Ortho doctor said he would recommend a memory foam. Not the pillow top, but the whole mattress. We love it and I have slept better. I hate to say this, but a new mattress is no time to look for the cheapest one. Continue to check sales at local stores and on line. Good luck and sweet dreams. I have been surprised that I have, on most nights, slept through the night......something I have not done for years.