You missed one of the most important points ala_xfire made.

"at age 18 you should take caution"

Modding this car is not cheap either. The intake costs close to 1k unless you DIY. I went the DIY, now I went back to stock. Pulley is fairly cheap.

I would say this is too much car for most 18 year old teenagers. It is by far the fastest car I've been in or owned. Just becareful.

A 350z/g35 would be 'easier' to handle for a teenager, they have less power. Different powerband.

good luck! I hope you buy the srt6 and live to tell your grandchildren what an amazing car it was. Or buy a beater for cheap and buy the srt6 in a year as weekend warrior or something.