Headphone Microphone ability for phone calls?

I am an assistive technology provider, and I have a guy that wears hearing aids, and I’m looking for a product that he can use to make phone calls with as well as all the other functions you headphones provide. Does anybody have any reviews on how well the headphones work for making phone calls? How about VOIP? My scenario is that I’m going to get him a TableMike for Dragon NaturallySpeaking, then plug them in hardwired to the TableMike for listening to the computer, then use the Bluetooth function for making phone calls. Does this sound like a viable solution?