We pretty much had the same comparison between the two vans. DH liked the Sienna better and I like the Odyssey better. Since I was going to be the one driving it, we got the Odyssey. We currently have three kids with one more coming in April. I have never even thought about using the extra seat in the van (2005 model so we have the removable seat), but I also don't transport people other then my own kids very often. I don't think I even know where the seat is right now so that is not an important feature for me. The power doors were a more important feature for us. I love them and don't want to have a van without them. It is so easy to drop my nine year old off and be able to open/close the door with the button. We also thought the Odyssey was more comfortable. Our closest family is about four hours away with my family being about 10 hours away and the Odyssey is so comfortable to ride in.
In the end, go with the one you like better. If you and your DH disagree, I'd suggest going with the one the main driver of the van likes better as well. I would still get the van inspected at an independent mechanic even though it's been inspected by the dealer from which you are buying the van. It will cost a little bit, but it would make me more feel better if I were buying the van. One reason we didn't buy the 2003 Odyssey last year is b/c the dealer tried to stall and not let us have the van inspected independently.
In the end, go with the one you like better. If you and your DH disagree, I'd suggest going with the one the main driver of the van likes better as well. I would still get the van inspected at an independent mechanic even though it's been inspected by the dealer from which you are buying the van. It will cost a little bit, but it would make me more feel better if I were buying the van. One reason we didn't buy the 2003 Odyssey last year is b/c the dealer tried to stall and not let us have the van inspected independently.








