Odyssey is great - I got mine after hauling 2 kids around AND my in-laws were in town and we had to have 2 cars on trips... very annoying.
Once I got it, I realized I should have gotten it long before. SOOOO many conveniences, good performance and easy to drive (doesn't feel AT ALL like driving a boat), etc.
Sienna is identical to me, if you have a Honda or Toyota already, that alone would probably drive me to one over the other (just to stay with one dealer/support team/etc.).
Interest only is good ONLY if you have they money to afford that house regardless and are strong about investing extra money instead of increasing your lifestyle to match the extra cashflow... If you meet that requirement, then you end up, after 10 years, with more money in the bank than you would have made principal payments, and you have had more interest payments for greater tax deductions. The risk is that the interest rates skyrocket before you can refinance to ANOTHER interest-only loan. It's all about opportunity costs, tying up money in paying down the house doesn't gain you anything, CASH invested in the market grows in value and can be used to pay off the house whenever you want... Ideally, have enough money in fairly liquid investments that allow you to pay off the house, then this is a very low risk way to increase your net worth.
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