Some bikes look "natural " with white walls, like the ones like Elvis rode...windshield and big saddlebags. So yeah, go for it. My bike would look silly with them.
Buy them. They'll look awesome. However, those wheels probably won't fit your bike if they are off a new heritage. I'm pretty sure the bearing size will be different. Unless you are planning on taking the tires off and remounting them. Then you're set.
Just got done getting the WWW mounted, wheels cleaned up nice and new brake pads..wasn't for sure about the white walls but I am now..love it..What do ya think? Oh yea the reflectors are gone now as well..that tape was a b-----