I don't have many options for good Sunsinger exotics unless i use gauntlets, but i really wanted to rock the IB gauntlets. Otherwise Ahamkara's claws and sunbreakers are pretty good.
-I can't get Praxic Fire
-Starfire is pretty useless.
-I have worn Voidfang vestments to death and they are intended to be used with voidwalkers, even though it works just fine for PVP sunsingers.
-
Probably Light Beyond Nemesis. That being said, Starfire Protocol is kinda nice and Heart of the Praxic Fire (should you ever acquire it) is the best by far.