Station to Station is his best. There was an excellent remaster that came out two years ago. If you get into him, and want to spend some money on a great package, get it:
http://www.amazon.com/Station-Deluxe-5CD-DVD-3LP/dp/B003UTUQ3O/ref=sr_1_1?ie=UTF8&qid=1327798836&sr=8-1
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Love is better than anger. Hope is better than fear. Optimism is better than despair. So let us be loving, hopeful and optimistic. And we’ll change the world.