Short answer: 31pt Lightning Sorc.
Long answer: Properly specced, Sorc and Sin are roughly equal, and all 4 DPS trees have their advantages and disadvantages. The 23/1/17 Sin spec, however, is PvP ONLY. It is useless for PvE content. Most of the utility doesn't matter. You can't effectively tank or DPS in it. If you want to do PvE on a Sin, get a real PvE spec.
What do you recommend?