You might also want to consider the Golite Utopia 2+ with the floor. Condensation management is good with the three mesh backed vents and the weight is 3lbs, 10 oz all is for a whopping 43 sq feet of space. Nice freestander and you have the option of leaving the floor behind in snowy conditions for a savings of a pound.

Alternatively, for more 3 -season use, the Integral Designs Sildome with Bug Dome puts you at just over 3 pounds for 40 sq feet (the sildome alone is larger than this). Modular approach but not freestanding. Palatial for one!!