Either way I'd suggest new valves and valve springs, just cheap insurance. Roller rockers imo, are harder to adjust until you get a feel for them, consistancy has to do with wear, in theory they should create a situation requiring less frequent lash adjustment. Pry no seat of the pants feel in performance, but the rollers will be stiffer than stamped rockers, also less friction. It all add up to the adage of a lot of little things.....
