I think sherry has a sweetness akin to balsamic. If you don't want the salad to look muddy, I would use white balsamic, or half wb and red wine vinegar. It depends on how much of a 'bite' you want the salad to have.

When it comes to salads, it's often about what the cook likes most.

I'd probably sub the red wine vinegar, using a little less than what the recipe calls for and adding to taste. Of course, strawberry vinegar sounds like it was made for salads, so that might be worth trying in it!

Thanks for the quick replies! I think I'll go with red wine and white balsamic a bit at a time and see what it tastes like.

Balsamic vinegar is a good substitute for sherry vinegar and it is a little bit sweet. You might want to add a little salt to counterbalance the sweetness.

Red wine vinegar is the strongest of the ones you listed, but since there is honey in the recipe as well, that would counterbalance it some.

I sometimes sub in half real sherry and half wine vinegar.