Nice pickup OP. I'm sure the Sienna is nice, and dead reliable. But the wife and I tried other marques (Ford, Mazda, and Kia) and always ended up back at BMW. We'll most likely not try another brand again. We just enjoy the handling and feel of this particular marque too much. Nothing beats the way a new or well-maintained BMW drives.
I agree, it is nice to see a non "doom and gloom" thread. The wife's 2010 X35d just hit 156,000 miles and is doing great after a recent complete front suspension rebuild. She says it would be near impossible for me to convince her to give it up in favor of something newer.