a lot of the 6 3/4 speakers just cost more I guess 'cause the aren't as mass produced. the problem that you will run into on the dash speakers is the hole is so shallow there is a brace or ductwork below them. that's what a tech from crutchfield told me. the depth on the doors shouldn't be an issue they are made for 6 3/4 if you order from crutchfield, they will give you any adapters that you need