Talk to stopintime or DoubleEagle. They've both had luck with Dainese; one's 6'3" and the other's 6'5".
Yes, I like the way Dainese fit me - 6'3" with normal/long arms.
I'd say that a Euro 56 will probably be long enough, but at 190 you may have to get one of their race'ier models for it to be a proper fit.
Difficult to be sure without trying a few on.
Another Euro slim fit manufacturer with great reviews, also by me, is Rev'it.