I wouldn't go near it mate, stereo, rims they all amount to nothing in the scheme of things. I have been there mate, when I was shopping for my first car I wanted all those things like rims, stereo, tint, lowered, exhaust...look real pimp when driving to uni and around the city and that...but seriously other people are right, get something reliable and then do what you want to it...
I waited 4 months, saved every penny over summer looked at 20+ cars...thankfully I found exactly what I wanted, VS Spack and I paid $5000 for it with a Roadworthy with 204,000k's...full service history, brand new tranny, new tyres etc...so what your looking at for $6600 is not worth it mate, get a VT or a VX for that...not a VS (my mate paid $11grand for a 97 HSV enhanced VS SS and its a piece of crap, sump has dumped its oil like 4 times and everything just breaks)
So...get something reliable that won't need thousands of dollars of TLC..believe me you don't want that on your first car...