You might also want to look at the new Snow Peak Lagos. The solo weighs 2.75 lbs, not counting the pegs and corner guylines needed for high winds. The width is spec'd at 36", but is closer to 34" in practice, and the length is around 89", so good floor area (21.6 sf). Like the Warmlites, the door end will allow rain etc to enter when open. The floor can be unattached and pulled back about a foot at the door, but that's small comfort when it's really nasty out. But the outer is low denier polyester, and should sag much less than nylon. The frame is the conventional two-pole crossing dome arrangement (I think Eric has called this a "failed design"). There was talk in Japan of a solid inner, but the inner on the US model is a tight knit mesh that will allow rain to enter during the pitch. In fairness, the tent is intended for winter weather.
For comfort, a covered vestibule is good in the rain, but for high winds, the Lagos with the 4 corner guys might be worth a look.
The Goondies mentioned earlier also come with the 4 corner guylines for stability in high winds, and have the vestibules; but the low denier flies are nylon, and will sag more than polyester, so the design puts a lot of space between fly and inner. The reviewer states that the solid inner model could be pitched without flooding the floor.
Looked at the Tracksterman blog. Thanks for the reference. Interesting that he has gone to the double-cross pole dome with the Luxe Tiger Moth. The Luxes also use polyester flies, but a heavier denier that brings the weight up beyond the UL range.
(Luxe has a solo in this design, the Firefly, but not much space) With lighter denier polyester like that used on the Lagos, these designs might get down into the UL range. The better fabric would bring the price up, though.