Out of those 3, I'd go with the Tahoe. The folks bought them when they first came out, in 1995, it seems. Really good vehicle. Not as sexy as the others, but still a solid mosheen, and quite a bit more room than the Durango.
If you want to really kick it up a notch, check out those Acura MDXs. Dearest mommy is looking at one of those now.