not too bad... i just did this for my system as well
head unit: kenwood 859 $450
speakers: boston pro series level 7 $300-400? per pair
subs: 2 jl 10w6 v2 $300 a piece
box: dont know, could be around $200 for custom in my trunk just over the wheel wells
amp for speakers: $500
amp for subs: $750-1000
dynomat???: ???
damn, i hope this is an over estimate!

good thing i can install all of it myself