We just traded in our 2008 Honda Odyssey for a 2011 Tahoe. We have three kids (3, 6, and 8).
I sold my 2005 Silverado to get the van when kid #3 was on the way.
I got the Tahoe because the kids are getting bigger and I would like the ability to safely and confidently tow a camper in the near future.
I do miss the sliding doors with the kids. They are much more likely to swing the Tahoe door in to a parked car. We are working on awareness about that
I know my wife preferred the van, but this was a good compromise. I would say to evaluate your needs and go from there. Once I pay off the Tahoe my plan is to get her another van.
The van did have slightly more cargo room and a smoother ride. However, I prefer the feeling of a truck over the van. I also like the size and ride height on the Tahoe. The gas mileage is close enough that it wasn't a concern for us.
Both have pros and cons.