brake upgrade

I am looking for advice on updating the brakes on my 79 R100 /7. I am thinking about either getting a Brembo caliper or updating to an RS front end to gain the dual calipers. (If that is possible) Has anyone tried either of these or do you have any advice for me? If you have updated the caliper...

I'm doing a restoration on a 1980 R100T I bought on e-Bay. One of my projects was to move the brake master cylinder from under the gas tank to the handlebars(all BMW parts except for the brake lines). Today a friend and I filled and bled the brakes for the first time. I'm using Motul RBF 600...