Recommendations for 9 stone side sleeper?

Hi
Hi
I'm looking for a new bed as my current one is very old and is now causing low back, shoulder & hip discomfort/pain. I'd really appreciate your advice regarding which of your beds I should consider. I weigh just over 9 stone and sleep on my side. I prefer a cool bed with a soft feel. My maximum budget for double mattress & 2 drawer divan base is £1,500.
Thanks
Carol