I'd have to weigh my MR setup (guidelight frame, daypack, three belt pouches) but I think its <6lb which is about 3lb less than the NICE with the load lifters on it. I have and use both but don't regret the guidelight in most cases (I find it perfectly comfortable hauling 75lb while training). Main thing is I need to make sure a couple straps are tightened that didn't matter on the NICE and also in some cases I like the 21.5" frame height on the NICE with load lifters down so nothing is behind my head (day hunt stalking w/o a heavy load).
I do have interest in trying out an xcurve as well.
6.03lb for frame, day pack, PALS sleeves and 3 belt pouches.