When DH got tested, the doctor told me that over 20 million is good and that over 50% for motility and morphology is normal. The latter two for your DH might be a little bit low, but it's probably so close to normal that it's ok.
i had a sperm count of less than 3 million. and was told i didnt have enough to test for mobility, motility or morphology. i was devistated. 7 months on and my wife is pregnant!
i had a low thyroid which caused low sperm count. (after 6 months treatment i still only have 11 million) so he has more than enough of an army to take fort egg!!
My DH is has 13 mil sperm count. My OBGYN said yo have to go thru' iui or ivf, you can't conceive naturally. But his urologist said don't worry you guys are fine, its low but pregnancy is still possible. Note my DH has low morphology also.