SON if price is no object
SP if you're looking for value
Sanyo or Shimano for pure functionality
I have all of the above, they all work just fine. SON and SP have least turning resistance. SON widebody makes the strongest wheel and may be more durable.
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If someone tells you that you have enough bicycles and you don't need any more, stop talking to them. You don't need that kind of negativity in your life.