I guess it depends on how you do your mountain hunting. A kimber wsm will be 7-7.5lbs, depending on how you scope it. No flies on that rig for mountain hunting. The last thing I want in mountain terrain is a lightweight, compact eyeball.
I fully agree with you on the 7.5 lbs. rifle being about the perfect balance of light weight and shootability. 7-8 lbs scoped, loaded, slung, and ready to hunt is what I like. Get much lighter and it's tough to shoot well when the heart is pumping or the position is less than rock steady, get much over that weight and it's not much fun to pack.
Funny thing.....someone a long time ago came up with very similar criteria. I believe his friends called him Jack.
