Nobody can answer minus an exact plan with dimensions, the island marked where the ceiling elevation changes, a flat plan and drawing of the new space you have planned.

That said, you select a style which will allow a hang at the SAME level above the counter, with shorter chain or stem lengths accommodating the "vault" which is WHAT HEIGHT? AND WHERE on the island and the island is what size etc??

Thus ........it depends, and you have nowhere near enough info provided, to hazard even a guess.

Ditto