Keep in mind that if you change to a swing out mount, then you need to make provisions for installing a strap to keep it against the wall when you travel. I am changing the solid mount in my BC 3450 RB to a swing out mount, and I have purchased simialr straps to what holds the dinette chairs in place to install around the TV. I too, would like more viewing angle when we are sitting on the couch.
Good luck!...