I made a realisation today - I don't think Bibi wants the 1967 borders because he doesn't think they're ultimately defensible if the Palestinians were to become determined to destroy Israel - it's less than 15 miles from the western border of the West Bank to the centre of Tel Aviv. Many of us commute further.
Remember that when faced with a possible attack on those borders (the ceasefire lines from 1948), Israel struck first and in 1973, operating on the current borders, came pretty close to using nukes.
once again, i believe egypt annexing gaza and jordan annexing west bank would be a preferable solution (though an unlikely one at this point)