http://www.tarptent.com/double-moment.html#moment (1man) shown here with Crossing pole to help with snow.
http://www.tarptent.com/momentdw.htmlThe Double Moment is 3.25pds
I've got a 1 Man Moment and like. If weights an issue you don't want a GL SL 5 I have a GL SL 4 and its 4.5 pounds but there is plenty of room for two men and gear.
I'm a Six Moons Design slut I l love the Lunar solo and just biatch slap the snow off it.
Had a Lunar Duo and should have never sold it. And will own another soon.
There's actually a bunch of good stuff out there right around 3.5 pounds that will fill your needs
If you like more room and two vestibules for 2-3 days I'd seriously look at the Lunar duo at 2.5 pounds. TT double Moment would be a winner too.
If ya get a wild hair and want to spend over $400 on a shelter more bomb proof than the 6moons or the TT I've spent time in a KUIU Mountain Star and its a damn nice shelter and comes in at 3.5 pounds.. Great tent actually.. $$$