The Honda Odyssey and Toyota Sienna are the most reliable minivans, but are also much more expensive (as you probably realize).
How soon do you have to buy? Kia will have a redesigned, much improved Sedona in the fall. The current Sedona has been around a while, and in the past wasn't very reliable. We don't have reliability stats for recent model years because they haven't sold many.
I like how the Dodge rides and handles, but its interior does seem a bit dated.
I haven't had a chance to drive one myself yet, but the new Ford Transit Connect might be worth a look. It's narrower, but quite long in long wheelbase form, and also more agile. Reliability will probably be similar to that of the related Focus and Escape.
Mazda offers the Mazda5, but it's likely too small, the styling is odd, and fuel economy is just so-so.