Tommy,
While I believe the sync would be a great ball to punch up, why not buy another defiant?
For some reason, I can see storm making a polished hybrid with the g2 core as a complimentary ball. The lucid is still selling well and I see no reason for another pearl for now. Also, with the defiant soul being only about a month old, it would be sorta stupid for two dull hybrids be out. I also see this series becoming similar to the theory series. Dull solid, polished hybrid, dull pearl, and maybe something special like etm in a hybrid I dont know.