You are not going to find any inwall speaker that is as good as the Salons. A good starting point would be the Revel I30 inwalls. As far as the cabinet goes that you plan to put the salons in, it could be made from solid gold but it's still going to screw up the sound of the speakers. THESE SPEAKERS ARE MADE TO BE FREE-STANDING! Listen to what Leftistelf said above and fire your interior designer and hire an acoustic engineer.
