A very responsible response!
I apologize for jumping the gun on the my "color breeding" retort; I find myself getting very bent-out-of-shape when people say, "I want xxxxx color of stallion!" Not, "I want a stallion with a strong, short back that will help neutralize my mares long one!"
I think breeding of horses has become a rather trivial matter to some people and I would like to just clunk them on the head with a brick and scream that you're bringing a life into the world! Put some more thought into it then just what color this little booger will turn out to be!!! Haha!
The good thing about your mare is most of her "faults" can be minimized with the choosing of the right stallion; but that is all chance still... But regardless- you sounds like you're going to be making a responsible decision on your stud and I'm glad you have a plan for the foal already!