what id say to do is Get
2: Fourchannel Amps
A good set of Splits for the front make sure they are a good brand not just some shitty set of splits
good set of 6x9's
run the 6x9's and the splits off one of the four channels,
get the two subs and have them on the other four channel.
or what you could do is make the subs (paralell or series) wired so then they only come out to one set of cords and run the 6x9's and the subs off one four channel and then run the splits off of a good 2 channel amp instead of a four.
get a head unit with 3 sets of RCAs also, a deck id recommend is the Panasonic one which is mp3. which is this one http://www.panasonic.com.au/catalogu...v=CDT&cat=12_2
but yeah thats just my two cents