I have a 6-person, which is big enough for two people, tight for three. Condensation is an issue in humid climates. The stove will drive out the condensation, but as already mentioned, the stoves are small and don't stay lit long if you don't keep feeding them. In short, the stove won't stop the condensation that will occur overnight from your body heat, unless you wake up every half hour to stoke it. BTW, I have a medium stove. I tie my doors partially open so the moisture can escape during the evening, daytime, too, for that matter.
In warm weather, placing a nylon tarp on the ground to cover as much space inside the tent as possible will reduce the condensation on the tent walls because it seriously slows the moisture that might be pulled from the ground. Condensation in Western states/mountains in September usually isn't too bad, and I don't use a ground cloth there to save pack space and weight.
I don't have a liner. It takes up as much space and weighs as much as the tent. Sort of defeats the purpose of an ultralight tent/stove. On the other hand, if you don't have to pack it in, or pack only a short distance, a liner might be a good idea.