Ignore all the bashing comments on here, its not gonna get you anywhere.
Definitely can relate to you since I'm in high school as well and I've got myself an 02 WRX. I bought 17" rota tarcmac2's last year and picked up a set of Hankook Ventenus V-12 off of tirerack for about $450(call and ask them if they can get you a discount, i got 10% off)
If your completely set on not buying new, then check out Lehigh Valley Subaru Enthusiast's facebook page-- http://www.facebook.com/groups/182853303800/
Great deals floating around on wheel/tire setups as well as pretty much any other car part you can think of.
Also if your looking for a local shop that does good work, Stew's Tires in Schnecksville has great prices, especially if you order directly through him since his mounting/balancing fees are built into the overall price.
Pm me if you have any questions, Id be glad to help a local out