I have only one bow that works out to 64 inches and that is my ACS which is a longbow. I shoot it as well as anything that I own.
My favourite recurves are all a little longer, at 66 inches, a 1961 Kodiak Special, a 1963 Kodiak Special and a 1963 Polar.
I have a draw length of between 30 and 31 inches and the longer bows just shoot better for me.
Soon I will be receiving my Jon Gahring take down and it is a 62 inch bow, it will be a mate for my 62 inch Chek Mate. I expect both these bows to shoot fine for me as well. I shoot all my bows with two fingers under most of the time, and that seems to help with string pinch on the shorter bows.
So I guess that what I am saying is if 66 inch bows and 62 inch bows shoot well, then there is no reason to believe that a 64 incher would not be just as nice.
DDave