NaomiJoy2... I try to only use donors under 25 for much the same reasons as you posted. A new study also shows that the man's age may be a factor in Autism, and other genetic disorders. And, since I cannot do anything about my age, I do what I can about what I can change, by choosing to use younger donors.
However, if I were married, or in a committed relationship, I would take my chances with my partner.