Some other excellent 2-person tents to look at, from some of our innovative "cottage" manufacturers. Many of these have more internal space than the "standard" big manufacturer tents. Google for the websites.

Tarptent: Double Rainbow, Cloudburst 3 (new), Stratospire 2, Scarp 2 (4 season)

Six Moon Designs: Lunar Duo, Haven (combination of Haven tarp and Haven bug net, purchased separately). For extra lightness, the Haven tarp is available (when not out of stock) in cuben fiber (and more $$$)

Lightheart Duo from Lightheart Gear

Mountain Laurel Designs Duomid plus bug net (again, purchased separately)

For real lightness and quite a few $$$ over your budget: Z Packs Hexamid Twin. Bathtub floor and beak are extra. Mine, with beak, bathtub floor, guyline and stakes weighs just one pound!