REI Hobitat 6 or REI Base Camp 6 will be the best family tents that you can get to fit all your gear, members and still sleep comfortably. You'll also be able to stand up in both of these tents. I would lean towards the Hobitat for one reason, the Garage. Its an extra large vestibule that you can purchase separately, it creates an area for you to keep your bikes, coolers, chairs etc. that doesnt need to be in the tent, but still protected from the elements.
The Base Camp 6 is a large single room tent (Its what I use) that is 6' ft in the center. Its a little easier to set up, and its a lot stronger than the Hobitat design, so if you're camping in storms, or winter camping, it might be the way to go.
REI tents are some of the best tents on the market and always win awards for design, convenience, and features. They are rugged and if taken care of properly, will last many many years.