For our Troop and Crew, we have basically two standards, namely one for tailgate camping and the other for backpacking.
For the tailgate camping, we stick with troop or crew purchased Coleman 7x7 tents, so that we can maintain comonality at a reasonable price. I understand the zipper issue, because this is usually what fails first on these tents, although the poles come in a close second. However, since we have standardized, it has made the repair and maintainence rather easy.
For backpacking, we ask that our scouts buy their own or rent to buy from our troop/crew inventory of tents which are usually purchased at REI used gear sales or the equivalent. However, in California we often get by with a simple tarp due to the mild weather.