I 3rd what slammed_2.0 said. Just get your stuff little by little and go from there. I have a 12" Infinity Kappa and its plenty for such a small car. I was able to piece a whole system (DVD indash, all speakers, sub, box, sum amp, all install) for around $800-900! I took my time and planned everything out to work together well and got it over a few months. Also checkout Sonicexectronix.com they sell more gear in a month then Crutchfield does in a year, there prices are great too.
Good luck
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