Rocker arms

Looking to upgrade my rocker arms and shaft from the stock 273 ones. Is a race only engine but only sees 6000 rpm and has under a 600 lift cam. Been looking at the Mancini Rocker arms and they have them on sale right now for $450. Anyone ever have any issues with these? Is there another rocker arm setup that is better bang for the buck?
Studley, are you looking at these? Mancini Racing Aluminum Roller, 1.5 Ratio