I don't see them giving you native density, especially not Dr. Feller. It would be wreckless just in case you did experience more hair loss than you're anticipating. My father was the only bald one in his family and was never expecting to lose his hair based on the family tree so you just never know.
I think the most aggressive they'll go on the crown is maybe 45FU/cm2. Well actually have a look at this case. It might interest you.