Here`s the problem I`m 6'4" and the stock windshield does not seem to be tall enough. Is the H-D 22" windshield any better? Thinking of light gray in the 22".

 

At 6' 4" you are going to need a windshield with a curve at the top to push the air flow higher. A Long Ride Shield for something like that. There are plenty available, and I can vouch for the Long Ride as I have had two and they were both good and moved the air flow higher.

 

I'm 6'1" and have stock 20" shield. I look through it at 2" from top.
A 22" should do trick. How much buffeting do you get on stock shield ?

 

Check these out, I have one and it works great.
http://clearviewshields.com/shop/index.php