Need help on what vehicle to purchase!

I am not very car savvy, and I need some help from someone who knows what they are talking about and has experience. Here are the guidelines for what I must go buy:

-under 20,000
-must be used from a dealership
-really DONT want a manual, would prefer automatic
-v6 or i4 for insurance purposes (only a v8 in truck)
-good 0-60 time. preferably 4.5-5.2 seconds
-sedan, coupe, truck, suv (preferably full sized like a Tahoe)
-preferably real wheel drive

I don't want to race, or necessarily speed (I will). I just want something that can take off pretty quick and can accelerate (Top speed is irrelevant). I'm also willing to spend up to 2000$ for performance mods (no superchips, since I would like to keep a warranty). All suggestions and advice appreciated.

*I am a teenager, I don't know how to drive manual, I have been driving for 1 and a half years. Insurance needs to be low.

some of the cars I've looked at include:
-Hyundai genesis coupe 2011
-Nissan 350Z 2008
-bmw 335i 2009


Thanks everyone:smile: