1.) Fz1 bar will inexpensively give you a more aggressive feel and for me at 6' 2" achieved a more comfortable riding position, being more comfortable allowed me to feel the bike better and get better response out of myself and the bike.
2.) OSO2K noticed more comfort and ergos in putting these on than feeling more aggressive. Though the change seems small when looking at the amount it changes in foot position, you notice it at your knees and the angle your legs are bent at is more comfortable, thus more control.
Position wise this should be the most cost affective, but if you have money burning a hole in you pocket, show us all something new, it seems the FZ6 know no bounds in its ability to transform into exactly the bike it needs to be for its unique riders.