Here is my opinion on my super lanboy.....
Its light as hell, unloaded i am sure it weighs under 2 ounces. You might have a difficult watercooling it, I found it a pain in the ***. I had to remove the harddrive rack, which required drilling out the rivets, and it lost a LOT of support without the side panels on the case is flimsy as hell. It was also quite difficult to route the waterlines since its very cramped inside, took me three times to figure it out so i could actually stick my hand in the case without troubles. The case also gets scatches and dings very easy. And the side window, now bulges out like a dome. The carrying strap is a peice of crap, it has no back/front support, so the case could just slide out of the back.
If you want a case for lans, i full out recommend it, however i dont recommend watercooling it, as it brings the weight just back up there. Mine weighs probably pretty close to 40 pounds.