"Nick, the main difference between the Hexamid and the Haven is that the Hexamid is a single wall design." - Dan Durston
Actually, I was thinking of the hexamid with a bug shelter, so it would also be a double wall design. He doesn't have a twin bug shelter on his site, but I've talked to him about it, and he's willing to make one. Assuming a twin bug shelter would come out around 11.3oz(using the difference between the solo and solo+ weights, added to the solo+) and the tarp w/beak is 5oz. Would be about 16.3oz for a double walled hexamid with heavy bug shelter floor. 14.3oz w/ lite floor.
But, I still like the design of the haven for the dual entrances and probably a bit more comfortable to move around in for the other person. And, if I make the wife carry it, the weight difference doesn't affect me. ;) This is gonna make for a tough decision.