If you're a support, and you have philosopher's stone and heart of gold
I think you should upgrade to Randuin's Omen instead of Shurelya's Reverie.
The active on SR can't give you an advantage you don't already have. It can help you chase someone, if you've won a fight, or help you run, if you've lost a fight. Either way, the outcome wasn't because of SR. RO reduces enemy movement and attack speed, so you achieve the same movement gains, but also defend your team better. RO has better defensive stats as well.
So, why do I see all these supports building Shurelya's?
--
"What if you just eat vegetarians?"-neonreaper
"^ You are what you eat. ^_~"-Koiji