If you are looking for the best ride (both more comfortable, and safer through better tracking), I would suggest Progressive Shocks (and Fork Springs, too...), over OEM. They will make your '79 ride like an '09 -- worth every penny, IMO. Cheers!
1979 CB750K (sold, 2012, but not forgotten)
1983 Kawasaki 440 LTD Belt Drive (sold, 2011)
1993 Kawasaki Voyager XII