This is Viburnum sargentii 'Onondaga' and I managed to eliminate borer on these about two years ago. I'm armed and dangerous with permethrin already mixed and ready to go for next June's application.
You can find out more about this pushy little pest on The Morton Arboretum's site or the University of Illinois Extension service.
I decided to risk it. It's a lovely little viburnum, the price was right (free!) and I've conquered this issue before. With a little perseverance I'll have a nice plant for the back border and another viburnum to add to the burgeoning collection.