Got some questions for you guys!

Hey guys.  My name is Andy, and I'm going to be in the car market this summer.  I am currently 21 and a college student.  I will most likely be looking for a new car this summer.  I was planning for a 300ZX Twin Turbo, but due to winters here in PA I don't know how that will work.  I was looking into the A4 1.8T.  Before, I decide to look at them seriously, I need some input. 

I definitly want 5spd.  What kind of aftermarket is there for these cars?  I will drive it daily, but want some nice performance to it.  I was told they can run 15's stock, but I would like faster.  How much money would it take to put a 1.8T quattro into the mid to low 14's?  I'd like a nice everyday driver with some nice umph to it.  If you guys could hook me up with some sites with aftermarket performance that'd be great.  Thanks for the replies.

On a side note, my uncle is who got me into Audi's.  He has owned several A4's and now has an A6, planning on getting an S4.

here are a few sites

http://www.pes-tuning.com