I say use the title, you earned it. I'm sure it would be Dr and Mrs if he had the doctoral degree. I plan to be introduced just with first names as I plan to keep my name after the wedding. Its a huge pain to change (it was "fun" with the wedding but after the divorce it was a pain and I was cursing the ex for wanting me to change it the whole day I spent at the Social Security Office).
Congrats to all the doctors here: MD, DVM, and PhD's here. I'm a PharmD, just to add to the mix of degrees.