I finally decided to order the full metal bracket so I can just mount it once on the studs. I guess I can live with it sticking out few inches from wall and spend little money and rather be safe and make install easier. I do realized these tilt and swivel but they also can be straight as well? Seems every picture I've seen they are tilted down?

Axiom M60s, VP150, QS8s, EP500 -- Rotel 1075 & 1068 -- Panasonic BDT500 -- Panasonic 60S60