My first choice are the wide link plate sets from Melling. They are also marketed by several other manufacturer's, Dyna Gear, Speed Pro, etc.
I tried the Rollmaster deal once, and it did well for a couple of years, then stretched out so far it required replacement.
I like the strength and constant tooth contact design of the factory type link plate timing sets. One disadvantage is that they don't come with 9 keyways for easy cam degreeing......Cliff