5.25 Performance Mids (slight high end) - http://tinyurl.com/vfldoors - $67.89 You could wire these to the radio if you want to save money but these rely on a good mid tune with some power and the tweeters would blow out since you have to set from the head unit

6x9 Performance Mids -
http://tinyurl.com/vfldeck - $113.11 same as above

10" Subwoofer -
http://tinyurl.com/xosubs10 - $86.08 pretty solid entry sub

Use the factory tweeters if you have them in the front for the high end

Sub Amp (800RMS) -
http://tinyurl.com/phantomvflhybrid -$149.00 Good power. More than enough for the sub.

HeadUnit -
http://tinyurl.com/pionheadunitbt - $129.00 Pioneers are solid head units. They do good processing and a bad ass EQ
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I would do something like this but since I dealt with sound system woes and etc, I would just save up for a little more than this.