first car.. pls help!

hello everyone,
my name is trevor, i'm 18 and new to the forum. i'm sorry i have to do this, because i know you guys get a lot of these kinds of threads. anyways, here goes, im looking to get my first car, i have a couple of choices already in mind but i would just like your oppinions. i have been driving for two years now (my parents' car), and now want a car of my own. to sum it all up, i want a nice fun car ( for the track, strip, autocross etc ), that is relatively reliable(because it needs to get me from A-B), and around $4-6k.
here is what i was thinking of ( not in any particular order):
nissan 240 sx (s13 probably)
2nd gen rx-7 (t2 or n/a)
91-92 vw gti (16v)
save up and get an older e36

thanks for the help in advance, and if you have any other suggestions pls feel free to share.

trevor

Well with the E36

Its not cheap to fix a bmw and insurance will kill becouse parts are so expensive..