I'm starting to think that between the color, form, low petal count, peta shape, long peduncles, breeder, and timing, that this might be Sunsprite x Friesensohne. Put another way, a floribunda version of 'Midas Touch'.

I remember one of the ARS magazines from the 90s had the parentage for this rose (I think...). The code name is JACspri, the color and foliage are similar to Sunsprite, and Christensen used Sunsprite a lot during that time. Yet the actual parentage is unknown. Oh well.