ITS THIS SETUP PRETTY GOOD FOR 03 ENVOY?

i got a pioneer 7 inch double din six cd changer built it. infinity kappas conponets front. kappas three ways in back. with a jl audio amp e4300. subwoofer jl audio 1-12w6 with a jlaudio amp e1800. it sound pretty good. the b its really incredible for one sub. people always ask me if i have 2 or more subs in there. this sub rocks. what u guy think. of the setup