If you want a minivan the 2007+ Toyota Sienna is the most reliable. The 2008+ Honda Odyssey is a little less reliable, but still pretty good. Minivans are much more practical thatn SUVs because they use their space efficiently. SUVs are smaller on the inside and larger on the outside (at least, they feel larger to drive).
I'm assuming you want an SUV because no one wants a minivan anymore. The 2008+ Toyota Highlander is the most reliable midsized SUV. After that you should look at the 2009+ Honda Pilot.