Eever though of putting that money towards some quality water-cooling components that will stay with you for years and years to come ?
Id call that future proofing as all youd need is new mounting hardware (possibly) and maybe a new GPU block if you get a new gpu (wouldnt cost much after selling the old one) and you would always have a quiet and well Oc'd (assuming your going to OC most things on water) system for years to come.