So far, this is the current top pick.  Good artistic impression of 'S', Color choice is also good.  This logo should look good in any size, however; we have to reduce size to see if the current design blends into a blob or still looks good at 20x20 res like used in coin calendars, and coin market cap lists.

If this logo is picked, it may not be our final logo, and another contest may run in the future.