Sounds like a 9" would woirk for you...I am 6'1" and i have a 9" and i could go with a 11" and still see over...Longride shields ultra flip is what i have and i like it...
I am about 5'10" and I think the LRS shield is your best buy and best product for the money. I used a 9" Curve Mid Tint , it looks GREAT and it helps as far as wind over my head , Great Product.