Balanced hunting air rifle

I've gone through a number of different air rifles, and now appeal to the community for some advice.

I'm looking for a relatively lightweight rifle that meets the following criteria:

1. accurate
2. .22 or .25 with plenty of power to hunt
3. weighs around 7.5 lbs or less
4. amenable to mounting a scope
5. break barrel
6. well balanced.

After having tried a number of rifles, the closest I've gotten is the Crosman Titan Nitro GP, which I gave to a friend for their birthday. Even that, there were a couple of features I didn't like. It was too long (the same length as my birding shotgun), a tad heavy, and the scope would move around and not stay in place.

I want to stick with break barrels because I like the fact that you don't need additional accessories and be reliant on a pump or tank.

Any suggestions would be really appreciated.