My husband wasn't comfortable with my birth wishes either at first. I hospital birthed our first child, and it wasn't pretty. During that pregnancy however I decided I wanted to homebirth. I was 7 months pregnant, and he said "honestly I'm too scared" and we talked, and agreed to just try to get what we wanted out of our hospital birth. I told him that left a lot of responsiblity on him to remember (even though we had it written down) what was acceptable and what wasn't.
Then after his birth (medical indcution, IV's, stuck in bed, vaccum, I was cut...) I started in with the statistics, and proved to him through research that homebirth was the safest option for a healthy mom and baby. I agreed to keep an OB back up for that "just incase" which was honestly fine with me, because if I was transfered to the hospital, I wanted to know who every the doc on call was.
We both interviewd with the midwife, and he liked her right away. I had my questions (and asked them first) and he had his own, and he really liked how she answered them. We continued to discuss any birth related fears he may have, and he really listened to me when I talked about my body changes.
Both the midwife and myself went through the "emergency birth" (ie, fast birth) instructions time and time again, because that was at the forefront of my mind (just like pre-eclampsia was in my first pregnancy, and that is what happend). He was ready, I was ready, we had everything we needed.
My labor was 28 minutes. He caught the baby while the midwife was about an hour away at her home.

: It went just fine. Yes, he was scared, but when it was over, and she fussed, then nursed, he realized, it couldn't have been more perfect. Infact it's one of his last "truly happy memories".
Education is key. And to be completely honest, if not harsh to your husband, it's YOUR body, YOUR birth. Not his. He may voice his opinion, but where you give birth is ultimatly your choice.
Best wishes to you!