My thanks to John M for the South West US topo map (http://www.gpsfiledepot.com/maps/view/109/).
While this map for some reason has no "gold star", after hiking for a while on the Sierra, I think this is the best map available: it has the most precise road locations, and the 20ft contour lines give a very good outline of relief on my Garmin 62st.
I nominate it for a gold star!