Parents don't want to buy a V8?

Hi. I'm a college student and my parents are helping me with purchasing my first car. They are paying for it and I will be paying them back over time. Sounds perfect right? Not quite. I'm very picky about vehicles and our maximum spending range is $6000. I live in Madison, WI so the market is fairly limited. My parents say it needs to be within 75 miles so if it breaks down we can take it back to be covered by warranty.

All reasonable but the problem is, like I said, I'm very picky about cars. The way I look at it, this is an investment, and the only car I will be using until I am financially independent. Anyways these are the criteria that must be met:
1) black or silver
2) have a cd player
3) be luxury (power everything, leather seats, heated seats preferred etc.)
4) look nice [the only cars i like are sedans or coupes, cadillac (not catera), bmw, lexus (don't really like ES and no others are readily available in my price range), or mercedes (don't like c-class)]

So, thats a lot of information.
I'll summarize.

I want a car, ideally a black Cadillac STS with a cd player and heated seats, but it tends to only come in V8.

I actually found a 2003 STS with a V6, but it only costs $5000. My parents, and I'm a bit skeptical as well, are convinced theres something horribly wrong with it. Is there a way to get the dealer to be honest? HA! Or is it really that great of a buyers market?!

I search every day on craigslist, cars.com, and the local newspaper.

I either need to convince them a V8 will be acceptable, or find a car that both parties can agree on.

Advice? (Don't tell me not to be so picky, if I'm spending money, I need to like it!!!)

Seriously, stay away from the STS, a relative of mine had one 03 or 04model with the V6, the car had many issues, from paint peeling to engine problems, spent lots of time waiting on parts to fix the thing. I would look at something Japanese, style is nice but having a reliable trouble free vehicle is nicer.

I gots a '93 F-150 with just afew dents that I'll sell ya fer $6000. Tell ya what, I'll throw afew Caddy STS stickers on it.Just kidding. On a serious not, tell your folks the car is for you.Not Them. Refuse their generosity & buy your own car, that'll teach'em

Whatever vehicle you choose, please, have a professional mechanic thoroughly inspect the car or vehicle first before you buy it. It will cost you $100 or more, but trust me, it is worth the peace of mind. Make sure you are not getting a lemon or a car that does indeed have something terribly wrong with it.

There's nothing wrong with being picky- I am the same way. Get the car you want! But make sure you can afford it, make sure to have it inspected first, and make sure it has all the options you want. Also, don't get ripped off. Do your homework, and use KBB.com to establish the true market value of the vehicle before you buy it. Don't ever pay sticker price. Right now, with the economy like it is, you should have an advantage at haggling the price down.

Good luck, and God bless!

A car is not an investment.