Invitation Wording

What do you do if the woman is Dr. & the Husband is Mr?

Mr. & Dr. Michael Smith
Mr. & Dr. Michel & Jane Smith
Dr. & Mr. Jane & Michael Smith

Thanks!

the first one...

but remember to spell out the word 'and'

thanks!
I was told that for 2 drs. I should spell out...(if they are both doctors)
Doctors Michael and Jane Smith.

Are you going to spell out Mister, Doctor, etc?
Or if anyone else has any opinions? suggestions?