I'm only weighing in on this discussion because I used to own the Hubba-Hubba, and have since owned both the TT Cloudburst and the Rainshadow 2, and I can address your size question.
I actually found the Hubba Hubba to be quite small. Two 26"-wide ground mats laid side-by-side in it was pushing out on the tent walls, and interfering with zipper operation. Additionally, there was no room inside for gear, and so gear had to be left out in the vestibules of the fly. And in heavy summer rain on a mountain in Maine, I had condensation problems (with condensation forming on the fly and dripping into the tent through the mesh), because ventilation in the Hubba-Hubba is pretty much non-existent with that fly on and closed down enough to keep rain out.
In contrast, both the TT Cloudburst 2 and the Rainshadow 2 are quite roomy. In floor-area alone, the difference between the Hubba-Hubba and the Cloudburst 2 is substantial (4200" sq., vs 5687" sq.). The Rainshadow 2 is even larger, and for only about a 1 oz. penalty in weight over the Cloudburst.
The Rainshadow ended up being my tent of choice because of all the extra room it afforded two people. If you think the Hubba-Hubba is sufficient, the Rainshadow will feel absolutely palatial. Two people PLUS gear all fit quite comfortably inside that tent with room to spare. Recently I pitched it in the backyard for extra sleeping area when family was in town, and it ended up being a place to "hang out" in the evening - with 4 adults and a small child all comfortably in that space lounging and talking.
As for condensation, I cannot speak for the other single-wall tents you are interested in (I think the article that was linked to does a really good job of addressing the issue tho). But I CAN tell you that condensation has been almost NO issue with the Rainshadow. You DO have to pay attention to wind direction to make sure you are pitching the foot of the tent INTO to the wind, so that you get a good through-breeze, but that is not hard to do and the breeze keeps the air in the tent fresh - I REALLY like it.
Even in rain, with the tent "closed down" (i.e. the front beak closed), the tent feels airy if there is a breeze. You get SO much circulation with the tent walls not meeting the ground on the sides, and the front and back ends still quite open.
I wrote more about various conditions I've had the Rainshadow in here:
I've had more experience with the Rainshadow than I have had with the Cloudburst, but the tents are quite similar, and I'd imagine they perform quite similarly.