Tried a few cheap Galaxy Nexus docks until I hit upon this one. It's as perfect as it can be, for the price. Have it plugged into my PC and it both charges and allows ADB and syncing (seems to be a passthrough connection internally). The fit is just snug enough and it doesn't look as cheap as it costs (or the other docks I tried before).
Ok, so it's no match for the official Samsung docks, but for 1/3 of the price it delivers 95% of the functionality and looks, meaning I'm more than pleased with it.