A333 is my preference. The same fully flat seats like onboard TK or LO or LA aircraft.
B77W's or B77W's have the same seats like pmCO or some LH aircraft have.
Agree.
None of the Air China biz class seats really have privacy like reverse herringbone. But the advantage of the A330 is that although you have a direct seat mate, the beds are ultra long at 81 inches, and are wide with no foot cubby hole. They are also pretty comfortable in terms of padding.
I'd be choosing a seat in the middle block of two in the cabin, so no one to climb over.