Vinegar Alternatives and rice combinations in making sushi rice
I have never made, but I have eaten Arborio sushi, with Italian flavors and here in DC I have had latin-flavored sushi.  It was all great.   The Arborio sushi seemed like plain Arborio rice to me.

The rice vinegar is sweet and less acid (4% versus 6%), so if you try different vinegars you may want to dilute it a bit first and then compare for sweetness.  Say you have 2 tablespoons of vinegar at 6%, then add add one tablespoon of water to it to bring it down to 4%.