Comp Cams XR280r thoughts to given combo

I wondered about the need for the bearings on the timing set. Whether beneficial or not.
The 829s seem readily available and a decent choice of milder builds. Still pondering.
Not sure I will be doing any port work this time around. Maybe nicer valve job when valve springs are swapped out. My heads came with the hydraulic roller springs that may be on the light side for mechanical.