All I use are extra heavy Catwhiskers for silencing the bow down and one nock point.
I personally feel brush buttons are not needed. The offer leather saddles or fleece saddles for your grip but a pair of camo gloves with tiny "grippers" will give you a solid grip. I would go this route only if your hands sweat alot and slip around while holding the bow.
I know one bowhunter who is adament about bow noise. He has 10" of yarn wrapped around his string from the loop down, Whiskers below that and felt on his limbs covering the string grooves.
A little compulsive for my taste but to each his own. The less the better........