Which mattress for sports recovery

Hello,
The long story short is that i play contact sports and undertake weight training, therefore come night time, i like to sleep on something that will make my body feel 'weightless'.
I tend to sleep on my side, my weight is currently 82kg, sometimes 85kg and im 5'9".
My current mattress is around 8 years old, from Dreams and is a 1400 springs/" title="pocket spring">pocket spring latex topped one.
Thanks