I have put a feature request in for this, to see what our developers make of this:
case=73487
We try to limit the number of options in VA, but you do have a good point here.
For now, since you are not using / and *, have you considered turning off surround selection in VA's options dialog and instead using a couple of basic VA Snippets to surround with {} and () ? The snippet bodies:
( $selected$ )
{
$selected$
}
should do what you want, and you can bind a keyboard shortcut to the command VAssistX.VaSnippetInsert to make it quick and easy to trigger and access these shortcuts.