I'm trying to decide between these two shelters and need some input from anyone that has either of them. What are the major differences between them? From what I can tell the only major differences are that the Rover is about 9" taller and the FX is 8lbs lighter. I'm kinda leaning towards the FX since I'm trying to keep weight down. I think I remember reading somewhere that the FX uses heavier material also. Any help would be appreciated. Thanks. I can get them both for the same price so that's not an issue.