i also use braid for flipping and punching , i use 30 lb. braid (also what i use for frogs) and fine that the braid does cut thru grass mats and line visibility is not affected at all . like has been said , flipping and punching is a fairly short line technique so i don't worry about "line bow" with braid while flipping plus i use fairly heavy weights (3/4,1,1.5 oz. weights) wich takes out the "bow" letting you get excellent sensitivity and great hook sets
anyhow , as far as using mono , what i just desribed about braid is the oppisite with mono ( too much stretch , far less sensitivity , mushy hooksets ) but then again , if it works for you ....