The The North Face Nebula looks amazingly like the Eureka Assault:
http://www.eurekatent.com/p-67-assault-outfitter-4.aspxThat's the commercial version of the Marine Combat Tent that Eureka makes for the USMC. I really like the tent, though I prefer not having pole sleeves and like having the taller (6') tents for longer-term camping.
The Assault is a very nice tent, but as you say, its a bit on the heavy side.
Ken K.