Third option balsamic vinegar ? That's a world away from white vinegar , as a fully trainer chef i wouldn't go running out to one stop to get white vinegar if you have already got malt .The real answer is here answer 2 being the best
You might be a fully trained chef but you aren't necessarily familiar with the nuances imparted by the rang of vinegars in suces, relishes and chutneys.
Take it from me that the outcome of using malt, wine or even balsamic vinegar as a substitute for white vinegar is inferior to the results obtained from white vinegar. The three substitutes taint the products, perhaps imperceptibly to the untrained palate, but to aficionados of all things spicy the difference is great.
I've experimented enough to know that they don't work as well on the flavour front.
As an aside for a mock low calorie Pimms, dilute balsamic vinegar with a decent low calorie lemonade until it is the colour of apple juice. Fine tune the ratio to taste. Serve garnished with mint leaves and chopped fruit.