WB ute is my favourite because they had all the modern updates such as tail lights, modern front, blue motors and the Kingswood had the big moldings up the side. I always hated the earlier side moldings as they looked like a left over from the HK/t/g parts bin.
As for GTS and Sandmans, well hard to compete when Holden got wimpy and deleted them. Hang on, funny how they deleted GTS and Sandman BUT kept building the WB Kingswood. That clearly shows that only the best survived into the 80's to take the battle to Ford.
All repeat after me, WB is clearly king!