For dérailleurs, I like the Suntour Cyclone and Accushift stuff (Accushift was their indexed shifting gear, but works great in friction mode). Shimano Light Action, 600, and older 105/Dura-Ace are smooth performers that don't cost too much. I especially like the older 105 and 600.
For hubs, older Shimano hubs spin nice (as do Sansin/Sunshine), and they don't cost an arm and a leg. Possible sleepers re: bang for the buck are the "Schwinn Approved" hubs on some of the junkyard Varsity/Continentals that can be found anywhere. Many of those are decent Normandy alloy high flange hubs, and can be rebuilt/polished to a nice looking solid performer.
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"Love is not the dying moan of a distant violin, it’s the triumphant twang of a bedspring."
S. J. Perelman