20-30 years ago the emphasis was on Blocking Dynamic Range and a value around 130db was good, 120 really so-so. Among the top in the Sherwood List, some have a value around 120. Choosing among the top list rigs makes sense for the CW contester that aims to win a contest. However, I truly think that the best contesters with a rig listed in the bottom would still compete for a podium.