dude go hard on the h/u get a nice alpine one.. will be a bit exxy regardless, for a decent double din your lookin at several hundred (brand new)
then speakers maybe about 250 a set ? alpine type r's or type s's for example, and amp them.. probably 2-300 on the amp
then get an ok sub and amp (id say pioneer for this, i honestly think they do pretty well say you spend about 300 for both - personal experience) i think duals are a bit of an overkill when you could just get one nice clean sub and power it up.. and if u want massive bass get a ported box
plus dont forget wires etc.. prob 150 all up ? for decent set 4gauge
and before i forget.. it really depends on what you listen to aswell.. if u want massive bass. go phard on sub/amp nd def get a ported box
soo.. say 700 for h/u.. 500 for speakers 250 amp 300 sub and amp 150 wires.. thats 1800 example.. ofcourse u can get sh*t cheaper if u get it 2nd hand or find a friend whos into sound systems whos just upgraded or has spare stuff...
ofcourse this is my opionion.. and people may disagree
if your lookin at brand new stuff, try
http://www.elite-electronics.com.au iv been browsing at their stuff, and for brand new sh*t its fairly priced

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