The aluminum rockers look cool, but for your build, they're not going to make much if any difference over your original rockers. Stock adjustable or aluminum roller adjustable rockers have a little more ratio if I remember right, but at your cam's lift, just not going to make a hills of beans difference. They won't hurt anything, just won't add much if any HP to your build.
End stands or HD shafts on the other hand fix a well known problem or weak spot in the FE rocker design. If your original shafts are worn and need to be replaced, replace them with a set of HD shafts; if your shafts are OK, add a set of end stands. Either of those fix or put an end of that problem area.