I don't have experience with tinted windshields, so I can't make any recommendations for them.
If you are strictly using your bike during daytime, and for short trips in predictable weather, then by all means, get a tinted one. However, if you are planning on longer trips, or on occasional evening/night rides, I would advise against using a tinted shield unless it is so short that you can always see over it even if it is set to the highest position. At night, in rain, or fog, the last thing one needs is a tinted shield to further reduce the view of the road. Under those conditions, even here in Southern California it is really nice to raise the shield in to block the chill. So to me, clear is better. I would recommend wearing sunglasses on sunny days, or a helmet with a clear visor and a secondary tinted shield that you can flip up or down when needed instead.
BTW, the stock windshield should be about 18" high.