mate i use to do stereo installs while i was at uni and now my brother does them for strathfield in sunshine (part time)
if u need them installed or brands recommended, let me know. He gets stuff cheap through strathfield (and one of his best mate does the installs for JB highpoint) or JB hifi. I'm sure i can organise a free install.
Also u need to decide what sort of music u want to run through the stereo. Different music has different speaker setups. His car is fully kitted out. If ur interested i can organise a time for u to see his car.