You can really go with anything. My fiance and I got completely different rings from one another. Mine is a white gold princess cut band and his is a solid gold comfort fit band. I figured they dont have to match and we can both be happy with them - we are going to be wearing them for the rest of our lives = ) FYI a lot of jewelers seemed to push the Tungsten on us...prolly since the FH is a mechanic, but he didnt find it as comfortable.
Good luck!