They have changed a lot on the new Sparks. My 2015 Spark 900 Premium has a Ritchey Pro headset on it.
Why don't you like the Syncros headset? Is it causing issues or do you just want something else? I don't know how much you care about the weight of the bike but there is a reason that they are some of the lightest bikes on the market and work so well being that light.
Mine is not stock either, its 1x11 XTR, XTR Race brakes, XTR crank, and Enve wheels so I get the urge to change things, just wondering about the headset.
By the way, nice choice on a killer ride!