Any of the hilts with gold highlights look good in orange - that's the Shock LE, the various Aeons and Initiate LEs and the new Sentinel and Apprentice hilts as well. It seems like the v4 hilts will look best of all, as the gold highlights on those seem much sharper then on the older hilts.
But honestly, orange looks great on virtually
any hilt - the Mantis CE I just ordered is coming in Fire Orange, and my
Dark Catalyst came in that colour as well. I probably wouldn't go for it on the azure Reaper or Mantis, but that's a personal preference.