no but they do pop up for sale all the time. Most of the time 7-10kfamily car??? My vote is a volvo wagon with a LS swap... Lol
to me a wagon makes more sense than a SUV if you already have an adventure rig.
but to suburban vs 100.... for strictly a family hauler i'd say a burb. Only for these reasons though, cheaper initial price, parts are also cheaper, it is comfortable and more roomy and returns better MPG in most models (not counting the 8.1 or 7.4). Now the 100 will out wheel a same year suburban hands down but if you aren't planning on wheel it then that wouldn't matter. They both will last you as long as you want them to if you take care of them.
In the end it call comes down to personal choice though so test drive a few and see what you personally think.