Don't know how their quality is nowadays, but I've had Harland Sharp aluminum rockers on our 351-C for nigh-onto 30 years with no complaints. Don't expect a horsepower advantage with any roller rockers. The advantage is in less friction so lower oil temps on long runs, and prolonging valve job life. They are also rebuildable if necessary.
Aluminum works fine with lower valve spring strengths & 6000 redline and cast steel for stiff racing springs & 7000-up redlines. I also run stud girdles and recommend them. Good insurance against broken studs and the girdles hold the adjustment nuts against slipping. The Ridgeways on our car is out of business but Jo-Mar is very similar.