If you're set on a minivan, the data on this site would support getting a Toyota Sienna. The Odyssey seems to be almost as good with the Sedona trailing a little behind that in terms of reliability; although certainly the Sedona will drop value faster, so maybe a '12 Sedona with less miles would be comparable to an 09 Sienna that costs the same? I would stay away from the Chrysler products - their data on this site isn't as reliable and anecdotally, I've known folks who've driven them, and even during the lease period, little bits and pieces seem to fall apart.
I don't know the exact volume of your stuff, but if it would all fit in a smaller vehicle, you would save a lot of money over the cost of ownership of a minivan. The likely smaller candidates would be a Honda Fit or a Mazda5. The Fit has about 2/3 the volume of a minivan behind the front two seats, but the passengers seat can also fold flat. Very easy to reconfigure; cheap to maintain; 35+mpg. The Mazda 5 is a little bigger and has 3 rows of 2 seats but is more streamlined and cheaper than most minivans; 25mpg. Your budget would get you a brand new Fit (with a couple thousand to spare) or maybe a year or two old Mazda5.
Another larger option might be the Ford Transit Connect. It's a van-type vehicle on a Ford Focus platform. I hear the seats are kind of a bear to wrangle, but they're cheap, voluminous, and get OK milage. A new or year or two old model might be cost competitive with a 5 year old Sienna/Odyssey.